Joshua stared at his reflection in the bathroom mirror, sliding off his boxers to reveal his erect dick. There was an unfamiliar smell radiating from his body, and Joshua wrinkled his nose in disgust; he lifted his arm to see a sweaty thick bush of hair in his pit. The sight surprised him; he was not a hairy guy, and he could have sworn his armpits had been smooth when he’d showered earlier that morning.
Joshua slowly slid his hand down around his member and started to stroke himself, still checking himself out in the mirror. He’d been only going to the gym for a few weeks, but he could already notice changes in his body. While still skinny, Joshua’s arms were showing a hint of definition and muscle, and his shoulders looked broader as well. If he didn’t know better, he’d even say he looked like he’d grown a few inches taller.
Still fondling himself with one hand, Joshua stepped into the shower and turned the water on. The cold stream hitting him in the face was refreshing. Ever since drinking the water back at the gym, Joshua’s skin had been electric with sensitivity, and the cool water was helping to relieve the sensation.
Joshua’s mind kept on drifting back to the gym as he continued to jerk off. There’d been a lot of hot gym bros there, sweaty and scantily clad in tight tank tops and exercise shorts. Joshua’s dick hardened even more, fantasizing sharing a kiss with one of the men from the gym. A voice in the back of Joshua’s mind found these thoughts alarming, as he had never identified as being gay or bi before, but he was too turned on and his body felt too good to care.
Joshua glanced down at himself to see that dark brown pubes had grown in around his dick. The area around his crotch had been hairless when he’d entered the shower mere moments ago, but he thought the hair looked good on him. As he looked on, hairs began to sprout around his nipples and down his stomach, leaving him with a dense treasure trail leading down towards his crotch.
“Oh, fuck yeah,” Joshua grunted, not recognizing the sound of his own voice. As he continued to pump away, his dick began to pulse, growing longer and thicker in his grip. He imagined forcing one of the gym bros down to his knees and thrusting his newly enlargened cock down the man’s throat. Even his balls began to embiggen, swelling to the size of oranges in between his legs.
Joshua’s previously pale complexion was now a golden tan, and he had grown significantly in height, now standing over 6’ tall. His arms continue to swell with muscle as his biceps grew veiny. He could no longer be called skinny by any definition; his shoulders and chest widened to give him the appearance of someone who went to the gym on a daily basis.
Joshua could feel himself close to climaxing. In his daydream, he now pictured having the gym bro bent over, his own lubed up cock sliding in and out of the other man’s hole. Joshua’s memories of science and nerd culture were quickly fading, being replaced with nothing but the desire to work out, watch football and fuck men.
Joshua’s body continued to fill out, his pecs popping out of his chest with newly formed definition. His slim stomach slowly started to inflate outwards into a round but hard gut. Joshua’s legs had been stick thin, but were now thick tree trunks of hard muscle.
Joshua cried out as he came all over the shower wall. With each ejaculation, more of Joshua’s mind and memories faded, erasing the former nerd from existence. His hair darkened and shortened while his face matured; the youthful, pimply boy shifted into a handsome, masculine man.
“That was fucking hot,” Ryerson panted, leaning up agains the shower as he was trying to catch his breath. He looked around the small bathroom he was in, pushing open the shower door without bothering to clean up his cum dripping down the side of wall. He found a towel hanging from a rack on the wall and used it to dry himself off before throwing it on the ground.
Still naked, Ryerson admired his body in the bathroom mirror, striking a pose to flex his bulging biceps. He had no memory of who he’d been before the change, but he was confident that his new body was an upgrade.
Ryerson was startled by a loud knock at the door. Apparently he wasn’t alone, wherever he was.
“Joshua? I really need to pee! You’ve been in there so long,” A nasally boy called from outside. Ryerson smiled, giving his still erect cock a few strokes.