ultram0th - UltraM0th's TF Stories
UltraM0th's TF Stories

🔞Here's some stories and pics from around the Internet that involve TF, either made by others or myself. (If you see your work on here and would like it removed, please message me and I will do so immediately!) 🔞Asks/Requests are currently paused.

309 posts

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The Cursed Gym 4

Winston pulled up into the gym parking lot, finding a space that was right in front. The hunk was already shirtless and readied himself to take a selfie for his Instagram so that he could gain more followers. 

“Obligatory gym selfie,” the stud laughed to himself. He gave a sly grin and snapped a pic.

When he went to add a caption, the hunk paused when he saw himself in the picture pursing his lips instead of smiling like he was supposed to be. He deleted it and tried again, opting to forgo the smile and look serious instead.

Winston huffed when he looked at the picture and, again, he was pursing his lips. Only this time, they looked a little bigger, almost fuller even.

The stud shrugged his broad shoulders and thought that he must’ve left some kind of filter on when he caught sight of his reflection in the rearview mirror. Winston jerked back in shock as he saw himself pursing his lips seductively in the mirror, and even when he noticed, he couldn’t stop.

The stud was horrified that he couldn’t stop puckering his lips, and not only that, but they definitely were bigger and fuller.

“Like, OMG, what even happened to my lips?” Winston whined, exaggeratedly gasping loudly when he heard himself speak. “Like, what– *cough, what is even wrong with… why can’t I, like, talk normally?” No matter how many times he cleared his throat or focused, the hunk couldn’t shake his new valley girl dialect.

Winston was so caught up in what was happening that he barely registered when another guy walked by his car and caught sight of him, giving him a playful wink. “Those are some nice DSL’s ya got there,” he teased, sending an odd shiver down Winston’s spine.

His body acting on its own, Winston opened up the door. “Well, like, why don’t you try ‘em out,” he giggled, screaming at himself as he helplessly puckered his large lips at the other man.

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More Posts from Ultram0th

2 years ago
Jose Stepped Out Onto The Stage, Ready To Show Off For The Heavyweight Class At The Bodybuilding Competition.

Jose stepped out onto the stage, ready to show off for the heavyweight class at the bodybuilding competition. As the muscle giant moved from pose to pose, he took immense pleasure in the awestruck eyes from the crowd who took in his vast form and admired his hard-earned muscles.

The stud formed a double-biceps pose, a smile wide on his handsome face as he knew that first place was well within sight. Jose continued to show off when his large, eight inch cock began to stir to life. Sure he took pride in his physique and he loved to show off, but the muscle man had never gotten hard while posing before, and his face reddened as his hard cock threatened to spring out of his tight poser.

Before he could properly react, Jose’s face went from red with embarrassment to pale with horror as he witnessed his own cock starting to shrink before his very eyes.

As it throbbed, Jose’s hard cock slowly pulled inwards, losing length and girth with each passing second. The crowd was stunned too, and gasps were heard as numerous people saw his eight inch cock shrink down, making the pouch of his posers go from looking stuffed with a banana to having a bunch of loose fabric from ample room.

Jose hurried off the stage, wincing internally as he ran due to the absent sensation of his junk as he moved. Once he was clear from the eyes of the crowd, the bodybuilder took a deep breath and pulled his posers down.

“What the fuck?!” he cried, his eyes going wide at the little nub that he now possessed. His eight inch cock was gone, replaced with a one inch cocklet that barely poked against his previously-stuffed posers, and his balls were tight against his skin and appeared more like grapes. Panicking, Jose had no idea why this had happened or what he could do to rectify it.

The now micro-dicked bodybuilder rushed off, beyond humiliated that his cock had shrank in front of a large crowd of people, and that his phone was blowing up with notifications filled with clips of the whole ordeal that was being posted online for all to see.


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2 years ago
Matt Huffed To Himself As He Walked Down The Aisle, Trying Hard To Ignore The Blatant, Hungry Glares
Matt Huffed To Himself As He Walked Down The Aisle, Trying Hard To Ignore The Blatant, Hungry Glares

Matt huffed to himself as he walked down the aisle, trying hard to ignore the blatant, hungry glares from the older man. The stud was used to attracting attention here and there given his carefully sculpted muscles and the way they always popped against his tight clothes, however, he still wasn’t a fan whenever one of those admirers was a guy– especially one like the old pervy man who would not stop staring at his glutes.

The stud reached up at the top shelf for some water, cursing himself for doing legs that morning, his glutes still pumped from his workout as they stretched his sweats tantalizingly.

“Damn,” the older man whistled, his smile stretching out his face.

Matt bristled at the comment and puffed out his chiseled chest in an attempt to intimidate his unwanted admirer. “Can I help you?” he grunted, glaring at the guy.

The older man smirked, a mischievous gleam in his eyes. “Just admiring the view,” he grinned, giving Matt a wink as he walked off.

A coldness passed quickly through the air, making Matt shiver. He felt as if his center of gravity was thrown off balance, and the muscled hunk wobbled on his feet as the sensation rapidly disappeared, rendering him slightly dazed.

“That was weird,” he muttered to himself, rubbing his temples confusedly.

Matt took a step forward, immediately noticing the foreign shifting and jiggling emanating from his backside. The stud froze in place and looked over his broad shoulder, his eyes popping out of his skull at the inflated butt he possessed.

His breath got caught in his throat as he stared down at the massively rotund cheeks that protruded off his lower back like a shelf. His ass had more than tripled in size, stretching his pants to bursting. His perfect proportions were completely ruined, looking like someone had taken his muscular torso and placed it upon a powerlifter’s bottom. His thighs had slightly widened to account for the new weight they now had to support, and when he moved, Matt blushed at his awkward gait. His thighs rolled against each other, making his inflated ass shift and bounce noticeably.

“Wh-what the fuck happened to me?” Matt stuttered, intending to give his new growth a hesitant poke but finding himself groping his cheeks with both hands, noting how small they looked when in comparison to the mounds.

Before he could ask anyone for help, Matt felt his stiff legs propel him forward on their own accord. His face was cherry red as he tried to stop himself from waddling, inadvertently showing off his new bubble butt, but he couldn’t stop his legs from moving. The entire time he walked, his butt bounced and jiggled, the fabric of his poor sweats groaning as they fought to keep his larger cheeks confined.

In fact, the stud was horrified to find that there was a characteristic sway in his walk. His hips popped more than they should’ve with each stop, seemingly making his butt jiggle all the more as if he were advertising it. Even when he noticed it, Matt couldn’t stop.

Matt struggled to figure out what was happening when he spotted the smirking older man in his peripherals. Without any control on his own, Matt felt himself bend down to grab something off the bottom shelf. Screaming to himself the entire time, Matt felt his hips wiggle, teasingly bouncing his inflated ass for the man to gawk at.

“Thanks for the show,” the older man smiled. “I thought you’d look better this way.”

He ran an admiring hand over Matt’s new bubble butt, sending a shiver through the altered young man that shot shocks of pleasure straight to his hardening cock. Despite his humiliation and panic, Matt pushed his huge ass into the touch.

The stud was quick to put two and two together, knowing that the older man was somehow magically responsible for his extreme butt growth and his uncontrollable actions. He wanted to beg to be changed back, to have his old body back and not have a future as a bottom-heavy slut.

However, when the older man playfully squeezed one of Matt’s massive glutes, the stud could only flex his inflated ass and moan out, “Fuck me, Daddy!”


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2 years ago

Lost a lot of my stories when I deactivated my old blog, but I managed to find this one. It’s been one of my most popular, and the guy in the picture in super hot!

Caleb Rested On The Dock, Trying To Ignore The Drunken Antics Of His So-called Friends And Past Football

Caleb rested on the dock, trying to ignore the drunken antics of his so-called friends and past football teammates. The stud had reluctantly decided to go back home for a visit during break from college, irritated over his southern small town’s simple way of thinking and living.

The muscled up country boy had spent years at college trying to dispel the stereotype of the less than intelligent redneck, irked that many of the students who were from more metro areas automatically viewed him as inferior or stupid. That led to Caleb taking incredible joy in the surprised looks on their faces whenever he would “casually” drop into conversation that he had a full merit scholarship for the university’s computer engineering program. He’d even fought hard to hide his southern accent so that people wouldn’t make false comparisons between him and a hick. His 129 IQ was something he was extremely boastful about, and now as he was at the lake with some of his old friends he’d left behind, he was quickly realizing that he’d outgrown them.

“Hey man, why ya sittin’ here by yourself?” the old quarterback, BJ, asked him as he sat by him on the dock, playfully nudging his broad shoulder.

Caleb inwardly cringed at the pronounced southern accent that only grew more prominent the more beers the guy drank. He ignored it and shrugged. “I guess I’m just not that excited to be home,” he admitted. “I was thinking about heading back early.”

BJ mock frowned. “Pussy,” he teased, handing the annoyed man a beer. “Just drink up and you’ll feel a lot better.”

Caleb took the offered bottle that didn’t have a label because it was most likely bootlegged. He waited until BJ had wandered off to go be a nuisance elsewhere before rolling his eyes. Still, a beer was a beer.

Caleb took a deep gulp of the bitter drink, grimacing a little from the intense alcoholic aftertaste.

“Whoa doggy!” Caleb whistled loudly out of instinct, wincing at the backwoods phrase he’d unintentionally uttered. He cleared his throat and pulled his phone out to read up on some engineering articles so that he could maintain his number one position in class.

As the stud read some of the articles, he knitted his eyebrows together. Normally the genius could tear his way through countless scientific articles in an hour. However, for some reason, Caleb found himself struggling to concentrate. A thick fog seemed to be forming in his head, clouding his thinking and making it difficult to understand what he was reading.

“Ma-macheen— Machin… uh?” Caleb tried to sound out M-A-C-H-I-N-E-R-Y, struggling to figure out what the letters spelt out. In fact, all the letters on his phone screen didn’t make any sense at all.

BJ smirked over at his friend, enjoying the sight of the hunk scratching at his head absentminded as he stared intently at his phone. “Doin’ alright over there, Smart Guy?” he called out.

Caleb looked up from the confusing words on his screen, glancing over at his shirtless friend. “I can’t figure out none of these words on my dang ol’ phone!” he answered, his southern accent back into his voice full force, even stronger than when he’d left for university. He paused and thought that something sounded weird, that something was wrong. However the fog in his head thickened and all Caleb could seem to focus on was BJ’s thick, meaty pecs and the large bulge in his trunks.

One of the other guys began to laugh. “Damn, BJ, you gave it to him?” he called out.

Gave what to who? Caleb struggled to grasp what was happening, but it was getting so hard to think. His thoughts seemed to melt in his head, no matter how desperately he grasped at them. He would force himself to think of something in one of his lectures, like cir… circuit… uh, something. Caleb’s heart began to race in his beefy chest as he slowly began to piece together that something was indeed wrong.

He stood up and took a step forward before he got distracted by his reflection in the lake. The man who stared back had an empty, glazed look in his blue eyes and his jaw was hanging open. Then he got distracted by the way his own meaty pecs moved whenever he took a heavy step.

Caleb dimly giggled. “Hey y’all!” he called out in his country boy accent. “Check out mah tits!” He bounced his large pecs, laughing to himself as the large mounds bounced and jiggled in front of him.

The rest of his friends began to laugh at him, some even cheering him on.

Caleb didn’t know why his friends were laughing, but they seemed to really enjoy the way his pecs bounced, so he kept on giving them a show, a dim smile on his handsome face.

“Dude’s gotta be stupider than a flat tire,” one of his hick friends mocked him.

Stupid? Caleb wasn’t stupid, he was a genius. He was smarter than his bumpkin friends and they were all super jealous of it. He opened his mouth to offer a retort, spill some knowledge about what he’d learned in university, but he struggled to even remember sitting in a lecture at all.

The muscled dummy gasped loudly as he realized what was wrong.

“What’s up?” BJ patronizingly asked, wrapping a buff arm around his broad shoulders.

Caleb forced himself to look away from his friend’s muscles, which felt like a herculean feat. “Bro!” he whined, stomping his foot like a child throwing a tantrum. “My head feels slower than a three-legged dog!” His accent was so exaggerated it was comical now, making him wince. “What’s wrong with me?”

BJ smirked as he rubbed a comforting hand over Caleb’s large pectorals, making the idiot whimper and shiver. “You poor dumb redneck,” he cooed. “We all got tired of you thinkin’ you were better than us all ‘cause you went to that fancy school.”

“I’m not some dumb redneck!” Caleb tried to argue, but when he stomped his foot again, his pecs bounced from the motion and he got distracted and started to squeeze them, moaning loudly for the other guys to hear.

“If I had to place a bet,” BJ smirked, “I’d say that 129 IQ of yours is probably down to 60. You’re good for nothin’ but fuckin’. You’ve got to be the dumbest redneck I ever did see.”

The fog continued to thicken in Caleb’s mind, and he was lost in the sensation of his strong hands fondling his own meaty pecs. It didn’t take long before the other guys joined in on the action, feeling up the stud’s muscles. All the while the redneck howled, happy to be back home with his fellow hicks.


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2 years ago

I wish I was more carefree and in better shape like those gymbos across the street I see every day from my office. Being an engineer doesn’t leave me with the time or energy to look like that!

I Wish I Was More Carefree And In Better Shape Like Those Gymbos Across The Street I See Every Day From

You were at work, whispering your wish to yourself as you typed away on your computer. Out your office window, you could see the hot muscle men walking in and out of the gym across the street, all of them wearing tight clothes that showed off their incredibly sexy muscles.

You forced yourself to stop gawking at the hot guys and focus on your work. You had a presentation to show your boss on an upcoming project that needed to be completed in a few minutes. You typed away at your computer again, but slowed down.

"Umm," you mumbled to yourself, scratching your head in confusion as you stared at the monitor. The longer you looked at the brightly lit screen, the more the words and code looked more and more like a jumbled mess. The strings of info was beginning to look utterly indecipherable and you struggled to understand what you had typed earlier.

"Adam, please email me the slides for your presentation!" your boss called out from his office.

"Um, sure thing, Bruh!" you answered back, flinching at the odd way you responded, almost thinking that your voice was deeper... and slower?

You shook the thought away and went to send an email to your boss before pausing. Again, you stared at your computer, trying to remember how to send an email. You mindlessly clicked on random icons and links in an attempt to remember, but it was useless.

Pop!

You cocked your eyebrow and picked up the button that had fallen onto your desk. You looked down at your button-down shirt in time to see your pecs steadily inflate, growing larger and rounder until you had to readjust your arms around their new size. The rest of the buttons popped off your shirt, leaving your new protruding pecs out in the open, capped off by large nubby nipples. Before you could react, your arms were affected by the mysterious growth as well, bursting your sleeves at the seams as your new biceps pushed through. Your bulky arms rested atop your new lats, and you squirmed in your seat as your glutes began to inflate and stretch your pants to their limit.

"Whoa..." you slowly muttered as you stared at the dim reflection in your monitor, your jaw hanging low. "What even happened, Bruh?" You lifted a buff arm and flexed a massive bicep, feeling a stirring sensation in your cock as you watched it contract to enormous size.

"Adam!" your boss called out, snapping you out of your dazed inspection. "Your presentation moved up, time now!"

"Sure thing, Dude!" you bellowed in your deepened voice as you stood up from your chair. Simply maneuvering through the office felt awkward: your enlarged thighs rolled over one another, your arms hung akimbo at your sides, and your pecs felt so heavy and cumbersome.

What was even more worrying to you was that it was so hard to concentrate-- on anything. You knew that something was wrong, that you couldn't possibly have gained fifty or sixty pounds of solid muscle in mere seconds, but there was a thick fog rolling through your brain that you couldn't seem to shake. Even when you passed by a window and saw your inflated form in the reflection, you weren't filled with concern over being turned into some dim muscled hunk. Instead, you felt your cock harden in your tattered pants as you couldn't stop yourself from bouncing your massive pecs, a wide grin on your face.

You waddled into the office, immediately noticing the group of men looking at your inflated form from the table in the center. Without a moment's hesitation, you lifted your massive arms above your head to form a double biceps pose, delighted in the lustful awed stares from the onlookers.

"Yeah, check it out, Bros," you guffawed, your cock rock hard now as you flexed for the other men. "I got these massive muscles, little dudes. Wanna feel 'em?"


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2 years ago
The Bubblebutt Curse

“The Bubblebutt Curse”

Picky Luke, who prefers bottom-heavy men, gets cursed so that every man he finds attractive grows a massive, sensitive bubble butt.

“What about him?” Luke’s friend, Erin, asked as she pointed towards the other end of the bar.

Luke, sighing, followed the direction of his friend’s manicured finger to see a handsome man who was eying him. The unknown guy was attractive, with his trimmed blond hair and the bulky muscles that filled out his polo nicely. However, the more Luke checked him out, the more the picky college student could feel himself getting turned off the slightest bit.

“Uh…” he mumbled, feeling a little guilty since he’d dragged Erin out to the bar to help him feel better since breaking up with his longterm boyfriend, and despite his friend’s help, he still hadn’t moved on.

“Don’t tell me,” Erin huffed, a knowing look on her face, “‘He’s not your type’.”

Luke blushed a little before nodding and finishing off his drink.

Erin rubbed at her temples in quiet irritation. “And what is it this time?” she pressed, giving the grinning stud at the bar a look-over, knowing that if he were straight, she would’ve been down for it.

Luke bit down on his lower lip. “I guess I’m just picky,” he lowly admitted, feeling a pang of guilt as he checked out the stud at the bar again.

He couldn’t deny that the guy was quite the looker. He had chiseled good looks and a smile to die for. Plus, the way his pecs pressed against the thin fabric of his polo was mouthwatering. Yet, thanks to his standing position, Luke could tell that the stud didn’t have the one quality that he was pretty firm on all of his guys having: the stud didn’t have a big butt. The picky twenty-two year old fought the frown that was threatening to form on his youthful face at the way the stud’s jeans sagged a little at the back. It made it look like the guy concentrated on chest way too much at the gym, totally forgoing leg day. Sure, if Luke were to invite the stud back to his apartment, he was a little hopeful that he’d find that the stud would possess a perky little bubble.

But that didn’t turn Luke on as much as a meaty bubble butt that pressed constantly against a man’s jeans, looking firm and rotund.

The bartender, a curvy women with beautifully dyed hair, grabbed Luke’s empty glass before giving him another drink. “On the house,” she winked knowingly at him. “It’ll be just what you need.” She then walked off to go help another customer.

“Th-thanks!” Luke called out to her, a little weirded out, yet happily accepting a free drink. He slowly sipped at the sweet mixture, actually enjoying it a little bit, especially the way it sent a tantalizingly tingling sensation throughout his slender body.

Erin, unaware of this, rolled her eyes as she sipped on her cocktail. “So, he has a killer smile, looks like he works out, he looks a little older so he’s not a student, and he ordered name-brand liquor so he might have some money,” she countered. “What is he missing?”

A pink hue settled on Luke’s face, the normally shy and quiet economics major not used to talking about his sexual desires. Given his lanky frame and lack of serious muscles, everyone expected him to be the bottom in his relationships. He didn’t mind taking it every now and then, but what really got his blood pumping was fucking a fat set of cheeks attached to some muscled stud, watching the guy moan like a slut as he was stuffed by his eight inches. The juxtaposition of a top-looking stud with a big butt who begged for cock nonstop was too hot to turn down.

Erin snorted at his silence before turning to the stud. “Hey!” she called over at him. “Come join us!”

The blond stud in the tight polo perked up slightly, his grin growing as he grabbed his drink and began to saunter over to the other side of the bar.

Luke gave a quick glare before forcing a smile onto his face as the stud approached, taking the seat right next to him. Up close, the stud definitely was good looking. His blue eyes glimmered underneath the low lights of the bar, and his skin was sun kissed with a slight touch of the beginnings of wrinkles, letting Luke know he was older. 

“Hey there,” he smirked in a warm, deep voice, “I’m Caleb.”

“Luke,” the smaller guy simply said, taking a larger gulp of his mysterious cocktail.

“—and I’m Erin,” Erin laughed as she stood up and grabbed her purse. “And I have to go.”

Luke glared at the back of his friend’s head as she retreated, but quickly swallowed his nerves and decided that since he was this far, he may as well try to make it work out with Caleb. After all, aesthetically, the guy was a 9.5 (he was just missing an ass).

“That wasn’t very stealth,” Caleb chuckled, gesturing towards the door Erin had left out of. 

“Far from it,” Luke agreed, already cursing himself over his lack of flirting skills. Luckily for him, Caleb seemed more than ready to take the lead.

“So,” the older man purred, resting a large, warm hand on the smaller guy’s thigh, “what brings you out here, and why was your friend so eager to leave you with me?”

It seemed that Caleb wasn’t too smooth with flirting either, yet was right to the chase, which Luke preferred in a guy. He couldn’t help but laugh a little, shrugging his thin shoulders and too lazy to come up with a nice comeback.

“I just broke up with my boyfriend so I’m looking to get one under my belt,” he answered, taking another sip of his drink, that foreign tingling growing stronger in his chest, making his heart race. He chalked it up to the alcohol content of it, ignoring the weird sensations for the moment, which seemed to grow the more he checked out Caleb’s sexy muscles, especially loving how his hard nipples poked noticeably against his small shirt.

Caleb squirmed in his seat for a second, but nonetheless genuinely still seemed interested. “Been there,” he said sympathetically, moving his muscled arm from Luke’s thigh to over his thin shoulders, illustrating their size difference. Again, Luke was incredibly turned on by this hunk of a man and often preferred to be the smaller one in bed, loving how hot it seemed to have a small top dominating a buffer bottom… but for the thousandth time, Luke was disappointed at Caleb’s lack of a bottom.

As time progressed, Caleb and Luke continued to flirt with one another, eventually moving on to legitimate conversation. Luke talked about school and how he was working on his degree, and Caleb mentioned how he was an engineer at some fancy company. Caleb was smart and handsome, and he had a decent job that provided a modest living— he wasn’t too flashy and he didn’t play time-wasting games. He gave off the impression that he was truly interested in the young man, making Luke think that if they actually did sleep together, Caleb would be the type of guy to actually still be there in the morning, possibly even making breakfast. They happened to share the same interests in video games, politics, pop culture… everything. The two were a perfect match and had one another laughing in unison at the bar as they chatted away with one another. And, Luke would not forget, Caleb was fuckin’ hot! The man was swole for days, his clothes looking as if they were painted on. He had light stubble on his chin and the way his chest hair coated his deep chest cleavage that showed through the undone buttons of his polo was so sexy. He looked like he was crossing bodybuilder territory with such a hot bod.

But… and it was a big but, Caleb didn’t have a butt.

A pang of guilt wrecked through Luke as he frowned at the way the older man sat flatly on his seat, with almost no cushion there to support him at all. Sure, he was insanely hot in all other aspects and the two of them connected on an emotional level, but Luke couldn’t shut up that superficial aspect of his young adult brain. The odd tingling in his chest intensified, and he reached over and downed the rest of his drink.

“So…” Caleb said, a light blush forming on his handsome face, and he reached up and nervously scratched the back of his neck, the action causing the bottom of his shirt to lift up and offer a sneak peek of his hairy abs, “would you like to come over to my place?”

Luke opened his mouth, but hesitated slightly. That weird tingling in chest grew stronger and stronger by the second, becoming all consuming and making him slightly worried that something was wrong. He ignored that and the awkward knowing wink from the bartender, instead deciding to go with his gut feeling.

“Um,” he began, already feeling like an immense jerk, “I have a really important exam in the morning, so I’m gonna go home. Thanks though.” He hopped out of his seat and placed a sympathetic/condescending hand on Caleb’s broad shoulder, hating himself already for being so shallow and picky. “See you around.” That tingling grew stronger and with so much fervor that it was almost painful, but the second Luke made eye contact with Caleb’s disappointed eyes, it fled, feeling almost as if it had exited it in a flash.

Before anything else happened, Luke quickly exited the bar and flagged down a taxi to take him back to his apartment.

Left alone at the bar, Caleb frowned to himself and sighed, his meaty shoulders rising and falling with power at the simple motion. The stud had come to the bar to blow off steam from work, but was pleasantly surprised to have hit it off so well with the young man. He’d actually felt a real connection and had invited him to his place to just keep the night going so that the two of them could connect some more. If it led to sex, great; if not, that was fine too. He’d actually genuinely liked the other guy, and had apparently struck out for some reason. “That sucked,” he muttered to himself, squirming in his seat again as he began to feel an unknown tingling sensation… in his butt. He huffed and paid his tab, the bartender smiling at him as he left.

“He’ll be back tomorrow night,” she told him.

Caleb just nodded, but couldn’t deny that he felt a little hopeful as he made a mental note to return the next night.

He exited the bar and walked down the sidewalk to his car, that tingling in his butt growing much stronger. The stud just figured that it was due to doing legs at the gym earlier that day. However, that wouldn’t explain why his pants suddenly started to feel a little more snug, especially in the seat.

“What is goin’ on?” Caleb asked himself as he looked over his broad shoulder, his eyes widening at the sight of his pants filled to capacity with his much larger ass.

Caleb had spent most of his gym visits doing chest since it was easier to show that off, and as a strict top, it made him appear more masculine instead of having a bubble butt. However, the stunned hunk was surprised to see that he now possessed a much rounder booty that popped away from his back, filling up his jeans to the point of bursting.

“What the fuck happened?!” Caleb panicked, reaching down and grabbing at his larger butt with both hands, deeply blushing at how each cheek filled up the entirety of his large palms, feeling soft and squishy. His heart sped up even more as the tingling continued and he swore that he could feel his hands steadily pushing away from his body, indicating that he was still growing. 

Caleb took off sprinting down the sidewalk to his car, his new booty jiggling and bouncing wildly behind him. As he ran, he could hear the groaning sounds of his pants struggling to contain his inflating cheeks. His jeans felt uncomfortably tight now, squeezing his cock which was starting to harden the bigger his butt got, further confusing the stud.

RIIIPPP!

The loud noise of fabric shredding and the accompanying rush of cool nighttime air blowing over this cheeks made Caleb stagger. His butt wiggled and bounced a lot more, making the stud moan and nearly blow a load in his tattered jeans. The tingling disappeared.

The addled hunk reached his car and gazed at his warped reflection in his tinted windows, his stomach dropping at what he saw. The muscleman now looked like he did legs way more than chest as his previously small butt had ballooned to what looked like beachballs strapped to the man’s back. They protruded away from his lower back at a near ninety degree angle and were so round and seemed to be in perpetual motion with every movement the hunk made. His trim waist seemed to pinch inwards even more before exploding outwards to form the massive cheeks. 

“What the fuck happened to me?!” Caleb panicked, reaching back and grabbing at his massive ass. “OOhhhhh!” The low moan he bellowed out alerted him to the extreme new sensitivity of his rotund booty, making his heart race in his muscled chest even more.

Taking one more hesitant look in the window, Caleb sighed and opened up the door. He had no idea what he could do or how he could possibly explain that his ass had magically tripled in size. He got into his car, wincing at the weird sensation of his inflated cheeks squishing as he sat down. Their girth keep him sitting a lot higher than usual, and the now bottom-heavy hunk cursed to himself as he readjusted his seat so that he could see while he drove.

The whole drive to his home, Caleb’s cock felt rock hard as the vibrations from his car’s powerful engine sent ripples throughout his massive ass. Every so often, the hunk was embarrassed to find himself squirming in his seat and flexing his cheeks, unable to hold back the low moans from escaping his mouth.

He reached his house and parked in the garage, thankful that none of his neighbors would be able to see him with such an inflated, massive bubble butt protruding out the back of his ripped jeans, making him look like a caricature wearing assless chaps. 

Caleb rushed inside and immediately stomped to his bedroom to assess the damage in his floor length mirror. 

It was worse than he thought. Turning to the side, Caleb nearly passed out as he stared at his reflection which showed off a muscled hunk with an ass which would’ve even been too big for a powerlifter. The cheeks were rotund and looked as if the man had attached a pair of basketballs to himself.

“H-how is this possible?” he wondered aloud, shifting his feet nervously, wincing at how even that slight motion caused his inflated cheeks to bounce tantalizingly. The altered hunk tore away the rest of his ruined jeans along with his polo and tried (and failed) to find something in his closet that would fit over this inflated rear. The poor hunk only groaned and hissed with annoyance as every single pair of pants either refused to travel up his widened thighs or ripped to shreds over his meaty butt.

Worse was that Caleb was painfully hard, his cock bobbing in front of him the entire time, looking small when compared to his widened thighs. The changed hunk knew deep down that this was no time to pleasure himself, but the bouncing sensations from his inflated butt kept making his cock throb with want and he was unable to do anything expect rush over to his nightstand for some lotion that he kept in the drawer.

Caleb grabbed a tight hold of his hard cock and began to jerk off, turned on by the way his cheeks felt when he sat down on his bed, causing him to rock back and forth on their extreme roundness. Despite knowing how worried and freaked out he should be, Caleb’s mind was fogged over with an all consuming horniness that was impossible to ignore. He continued to play with his cock, but was slowly starting to realize that something was off.

He scowled as he picked up speed, tightening his grip on his cock, the stroking motions feeling tepid at best. He even reached dp with a free hand and tugged on an erect nipple. It felt good, sure, but the frustrated Caleb felt far from release.

“Damn it,” he growled through clenched teeth. He was so painfully turned on and further frustrated that he couldn’t seem to get off. No matter how much he jerked off or played with his muscletits, Caleb was nowhere near climax. The frustrated hunk was almost at a loss when he remembered the vibrator that he kept in his closet, reserved only for the bottoms he’d bring home some nights.

Despite himself, at the initial thought of the vibrator, his cock throbbed and began to leak precum. In his lustful frenzy, Caleb lurched off the bed and waddled over to the closet, snatching the vibrator out of its place and lubing it up.

His heart raced as he turned on the small machine, and his hole seemed to throb with anticipation. The bottom-heavy hunk took a deep breath and reached around him, struggling a bit with his impressive biceps and lats constantly pushing against one another.

“OOOHHHHOohhhhh!” Caleb shrieked with pleasure as soon as the vibrator entered his virgin hole. The hunk had never been penetrated before in his life, but the sensation of being stuffed coupled with the vibrations of the sex toy made him see stars. His hole was bringing nothing but the upmost pleasure and Caleb sat back down onto his bed and wiggled his hips wildly, working the vibrator deeper into himself. Normally during sex, the hunk would let out a grunt or two, but now he was unable to keep his mouth shut, helplessly moaning out loud like the power bottom slut he was turning into. Never before had Caleb felt pleasure like this before, none of the times he’d topped another guy nor any of the times he’d played with himself— everything else paled in comparison to the amazing sensations his inflated ass was bringing him. 

“Fuuckkk!” Caleb bellowed as he finally came, shooting the largest load of his life which landed all over the hair on his chiseled pecs. The muscled mounds heaved as he caught his breath, slowly standing up and feeling the vibrator falling from his hole, followed immediately by an unsettling feeling of emptiness.

Caleb ran a hand through his hair as he stared into the mirror some more at his warped reflection, wondering how he was going to make it through his daily life with an inflated, sensitive bubble butt. However, his thoughts quickly traveled to the cute guy he’d talked to at the bar and he imagined the small guy fucking his tight hole, and his cock rocketed to life instantly.

“This is new,” Caleb half-heartedly chuckled as he grabbed the vibrator and lubed it back up for round two, making a mental note to return to the bar the next day before shoving it back in his massive ass, moaning loudly as he did so.


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