The Perfect Fit
Vince found the box sitting on the kitchen table when he came home from class on an otherwise completely average Wednesday. There was no shipping label, only his name written across the lid in thick silver marker. Inside lay a pair of expensive-looking boxer briefs—black, tight-cut, and perfectly folded. A small card rested on top.
FOR SOMEONE WHO NEEDS TO LOOSEN UP.
He took the card in his hand, and flipped it over, but there was nothing else to give him any clue as to where the gift came from or how they ended up with his name on them at his door.
Vince snorted. It sounded like the kind of gag gift his roommate, Marcus, would leave for him. Marcus was always teasing Vince for skipping workouts, complaining about being sore, or refusing to use the gym locker room.
Vince was gay, Marcus was not. A painful fact for Vince who always had a bit of a thing for his roommate - ever since they both got drunk at a frat party a year ago and were dared to make out for 2 minutes straight - something they never spoke about again. Their current living situation was perfect for Vince, Marcus always paid the rent on time, was fun to hang out with, and motivated him to be a better man - and sometimes he actually listened and went to the gym...sometimes....well almost never, but he thought about it at least!
That all said, leaving a pair of mildly sexy boxer briefs with a cryptic card for Vince to find was definitely something Marcus would have found funny.
Vince lifted the boxer briefs by the waistband. The material felt strangely warm. A sudden tug ran through his fingers. Vince tried to drop them, but the fabric stretched around his hands like liquid. Black gooey cloth climbed his wrists, swallowing his arms without tearing. Vince was overwhelmed by panic as he stumbled backward, shouting as his fingers flattened and merged into the material.
His shoulders folded inward. His chest compressed. His legs swept together beneath him. The apartment expanded around Vince as his body collapsed into something nearly weightless, flexible, and impossibly small. His voice became muffled, then vanished completely.
A moment later, a pair of tight black boxer briefs lay crumpled on the floor. Vince could still see, although he had no eyes. When he noticed the A/C kick on he confirmed he could still hear. He could still taste and smell - keenly aware of the smell of fresh unworn boxer briefs and a taste of dry polyester in his "mouth." Though when he tried to move, nothing happened.
After what could have been minutes or hours - how is a pair of sentient boxer briefs able to keep track of time - the front door opened. Marcus stepped inside wearing gray sweatpants and a sleeveless gym shirt, his duffel bag hanging from one shoulder.
“Vince?”
Marcus walked down the hallway and glanced into his roommate’s empty bedroom. He went to his bedroom dropped his duffel bag and changed into his gym shorts before walking back towards the kitchen.
“You home?” he repeated.
Then he noticed the open box and the black boxer briefs on the floor. Marcus picked up the card. “Very funny.”
Vince strained to move, but Marcus had already lifted him by the waistband. He tried to scream for help, to let Marcus know it was him, but there was nothing he could do.
“These are definitely new,” Marcus said.
He rubbed the fabric between his fingers, impressed by its softness. Then, with the casual suspicion of someone who shared an apartment with another man, Marcus brought the boxer briefs closer and sniffed them.
Vince felt the breath pass warmly through his fabric. He felt the short hairs on Marcus's upper lip brush against his new polyester body, tickling him. If he had to chose a word to describe the experience, intimate was the only one that came to his mind.
“Clean enough,” Marcus decided. "I'm sure Vince won't care if I borrow these. I can wash them and return them before he notices they're gone."
Vince would have gone red with embarrassment if he still possessed a face.
Marcus had neglected his laundry for more than a week. The hamper in his bedroom was overflowing, and the clean pair he had expected to find in his gym bag was nowhere to be seen. The mysterious boxer briefs had appeared at exactly the right time.
Marcus carried Vince into his bedroom, he pulled down his gym shorts and day old dirty briefs - still funky from his morning workout 6 hours ago - freeing his 7 inch cut cock to get some air. He put Vince down on the bed for a minute while he gathered some items to bring for evening workout.
Seeing Marcus's thick hairy thighs and large dick swinging around his bedroom while he packed up his gym bag filled Vince with a combination of panic and lust. Half of him was screaming for Marcus to notice that there was something off about the briefs, the other half was begging for Marcus to put him on - to stretch out his fabric with his massive thighs, to fill him with his plump toned ass, and to shove his sweaty hairy cock into his pouch. To saturate him with his sweat and musk.
Regardless, a few minutes later, Vince experienced the peculiar horror and intense eroticism of being worn by another man. Marcus stepped into him one leg at a time, stretching Vince’s new fabric body around his thick thighs. The boxer briefs tightened automatically, reshaping themselves to Marcus’s muscular frame. Vince’s waistband settled low and snug around his waist. His pouch cupped Marcus's dick - letting him taste and smell the sweat that had accumulated there all day. The fabric clung firmly, leaving no room for Vince to shrink away from the heat of his roommate’s body. Vince was both completely mortified and enthralled.
Marcus adjusted the legs and looked at himself in the mirror. “Perfect fit. Maybe I won't give these back to Vince, after all" he smirked.
The words sent a strange shiver through Vince’s seams.
At the gym, every movement became Vince’s movement. He felt Marcus walking across the rubber floor. He stretched with each long stride and tightened again whenever Marcus stopped. On the treadmill, heat gradually built between Marcus’s skin and Vince’s fabric.
Then Marcus began to sweat. At first it was only warmth, a faint dampness spreading through the waistband. As Marcus increased the speed, perspiration soaked slowly into Vince’s polyester body.
Vince felt all of it. He expected the sensation to be disgusting. In some ways, it was—too intimate, too inescapable. Marcus’s sweat settled into him, changing the dry softness of his fabric into something warmer and heavier. He could taste the salty water saturating his fabric. He could smell the musk accumulating around Marcus's cock and ass.
Yet beneath Vince’s embarrassment was another feeling he did not want to acknowledge. Marcus was working hard. Vince could feel the proof of it soaking into him. Every drop came from effort Vince normally avoided. Marcus pushed himself without hesitation, his body heating the boxer briefs until Vince felt almost fused to him.
By the time Marcus moved to the weights, Vince was damp and clinging tightly to every shift of his roommate’s hips and thighs.
Marcus squatted. Vince stretched. Marcus stood. Vince tightened again. As the workout continued, the sweat made Vince more aware of every movement. He could feel Marcus’s muscles tense before each lift and relax afterward. There was no distance between them, no way for Vince to pretend the workout was easy - that Marcus just looked the way he did from genetics or luck.
The dampness embarrassed him, but it also filled him with a strange, reluctant satisfaction. Marcus was sweating into him because Marcus was doing the work Vince always found excuses to avoid.
During a break, Marcus sat on a bench and wiped his forehead with a towel.
“Vince should’ve come,” he muttered. “He’d feel better if he stopped overthinking everything.”
Vince wanted to tell him that he was there. Closer than Marcus could possibly imagine. Wedging into his asshole, holding up his sweaty cock. Embracing his thick thighs. Instead, he could only cling silently to Marcus’s skin, warm and sweat-soaked beneath his gym shorts.
By the end of the workout, something inside Vince had changed. The panic had not disappeared, but it had grown quieter. He had been carried through every exercise he normally avoided. He had felt the heat, the exhaustion, and the sweat without being allowed to quit.
And beneath the humiliation was an uncomfortable flicker of pride. Back at the apartment, Marcus began to unpeel his damp gym clothes - first taking off his tank top, then socks and finally his athletic shorts. Marcus had a little post-workout routine that Vince was not aware of. After expending so much effort he liked to blow off a little steam with an endorphin rush by rubbing one out quickly before hoping into the shower.
Marcus climbed onto his bed, laying on his back and picked up his phone. He began scrolling through a tumblr of women he found attractive - with perky young breasts and soft curves.
Vince had no idea what was Marcus was doing - but he could feel his pouch begin to stretch as Marcus's growing dick began to push against him. If pressed to describe the sensation - the only thing Vince could think of was the feeling of being slapped in the face with a sweaty, hot cock.
After scrolling through a few women, Marcus reached his right hand down to his boxer briefs and began to rub his cock through the underwear. The polyester material felt soft and smooth as it slid against his growing dick. Vince could feel the friction warm his pouch. He could feel the sweat from the workout pressing against his fabric - it didn't take him long to realize what Marcus was up to after he tasted a bead of precum soak into his fabric.
Marcus continued to rub Vince's fabric against his crotch, spreading precum and sweat across Vince. He shifted Vince's position, pulling his waistband higher on his back - forcing some of Vince's fabric tight against his asshole, dick and balls.
Marcus spit on a hand and shoved it into his underwear, tugging on the shaft and letting the head rub against the soft silk-like fabric. Vince's sense were overwhelmed with the friction, sweat, precum, spit and the feeling of Marcus's ass cheeks clenching on his fabric.
It didn't take long for Marcus's entire body to tighten as he released load after load into Vince's pouch. The sticky fluid saturating into Vince's polyester. At the same time Vince felt a warm feeling flush over his fabric as an orgasm-like feeling rushed through all of his senses, taking them all offline for a brief second - leaving him in total darkness with only his mind still intact.
While Vince was left to wander what would remain of his existence, Marcus, having fully satisfied his post-gym routine began to strip the cum-soaked underwear off his body. When he pulled Vince down his legs, the boxer briefs felt heavy with sweat and stretched from the workout. Marcus held them at arm’s length and gave them another little sniff.
“Woof. I did a number on these. Definitely laundry day, tomorrow” he said.
He tossed Vince onto the bed and proceeded to head to the bathroom to take a shower. For the first time in hours, Vince was alone with nothing but his thoughts to keep him company. He felt a mix of relief and existential dread when suddenly the transformation reversed without warning.
The waistband widened. The legs lengthened and separated. Damp fabric became warm skin, muscle, hands, and feet. Vince spilled onto the mattress, gasping for breath, completely restored—and still covered in the lingering sweat and cum of the body that had worn him.
Before Vince fully got a hold of himself, Marcus came back into the room and froze. Vince grabbed the bedsheet and wrapped it around his naked sticky body.
For several seconds, neither roommate spoke. Marcus looked at Vince. Then he looked at the empty boxer brief box on the floor with no sign of the underwear in the room.
“Where did you come from?! Where did the underwear I threw on the bed go?" Marcus asked.
"You're not going to believe this ..." Vince replied as he tried to explain the situation to Marcus providing details that would have been impossible for him to know otherwise as evidence.
After a few minutes, the two men came to an understanding.
"You were…” Marcus said.
“Yes.” Vince replied.
“The boxer briefs?”
“Yes.”
“The entire workout....and uh, when I was alone after?”
Vince closed his eyes and pinched the bridge of his nose. “Yes.”
Marcus’s expression shifted as the full situation settled over him. “Oh my God...this is that frat party a year ago all over again!”
“This is way worse than that! And we are never discussing the fact that you picked up and sniffed a random pair of underwear on the floor before putting them on again! Straight men are so gross!" Vince retorted before Marcus could say anything else.
Marcus came over and sat beside Vince on the bed. “I really need to start doing laundry...”
Despite everything, Vince laughed. The next morning, Marcus found Vince waiting by the front door in gym clothes.
The black boxer briefs, now apparently ordinary, were clean and folded on the kitchen table. Marcus pointed at them. “You’re not bringing those?”
“They’re staying here,” Vince said quickly. "I think I might burn them."
“Good idea.”
Vince lifted his gym bag onto his shoulder.
Marcus raised an eyebrow. “You’re actually coming with me?”
Vince opened the door. “I figured out what the card meant,” he said. “And I’d rather sweat through the workout in my own body this time.”











