Jeff couldn't help but whine as he sat at his computer, his heart beating out of his chest. He nursed his stiffy in his pants, slowly rubbing the tip of his sensitive flesh through the fabric, the crotch getting slightly damp. The whole house shook as Dominic roared triumphantly in the next room over, his voice almost freakishly low. His low bellows almost drowned out the high-pitched screams of Jeff's now-emo older brother. No doubt, both of their enhanced balls had caused them to have the most intense orgasms of their entire lives.
The size difference between the two was already so extreme. Jeff's eyes flitted over the numbers for the two subjects on his computer screen. His chuckled, playing with the numbers for Subject 2... laughing at how insane it would be if he actually made it happen.
"Oops," he whimpered as he realized he didn't mean to click that...
***
In the next room over, the two former jocks, one now a twinkish-goth type, the other a massive muscular monster, laid on the bed side-by-side, a pool of the bigger man's cum oozing out of the smaller one's ass, both their chests covered in copious layers of semen.
"Fuuuuck, bro, you shouldn't have made me do that," Dominic huffs, grunting as he nurses his forehead, woozy from fucking his best bro so mindlessly. The more he thought about it, the more he liked taking his skinny best friend's ass. His giant prick slowly began to fill with blood once more, hungry for more action.
"That was awesome," Chris coos, feeling so empty without Dominic's huge, thick cock in him. His big balls began to gurgle, making more seed and urging Chris to pleasure the big man even more. He turned to his side and smiled lewdly at his huge friend, looking at Dom's giant dong fill its way back up to 9" erect and a whopping 5" around.
But then, something happened. Chris' jaw dropped as he watched Dominic slowly expand even further. Dominic didn't even seem to notice that his breathing was getting heavier, now sounding like a wind tunnel every time he took in air. The beast's pecs jutted out further, dense layers of hair sprouted out of his chest, a trail forming all the way down his torso. His abs, once tight, now expanded with so much meat, they started to bloat and round out into a carved roidgut. His quads and arms thickened, thick veins running down their lengths, so filled with mass they were splayed out.
Dom moaned as he looked back at Chris. He smiled back sheepishly as he played with himself, his fat cock getting even thicker and longer. His own hunger matched the one in Chris' eyes as he topped out at 13" in length and 8" in painful, ass-tearing girth. Dominic bit his lip, trying to quell his desires. But as his giant balls grew even more obscene, he knew his lust would take over again soon.
"Aww, fuck, bro... can we... do that again?" Dominic whispered. "Heh, it's just, you know me... My girl doesn't like doing anything with me and I'm always so pent up, given my condition."
"Condition?" Chris gulped.
Dominic's expression fell. "Ya know, with me being so freakishly large? You're the one person who isn't freaked out by my 450 pounds. Hehe, even my girl gets scared of my 13", bro! If I knew you shrinking down would make you so interested in me... I'd have done stuff with you sooner," Dominic said with a blush. Chris was so confused, his best friend didn't act like this normally. It was like reality had changed, one where Dom had always been a huge muscular monstrosity and had been treated as such.
"I've always been kinda weedy, don't know what you mean by me shrinking, man," Chris chuckled lightly, his gay heart aflutter. Dominic just gave him a confused look but ended up shrugging his titanic shoulders. "And I've always been into guys like you. Man, if I'd known you'd look so good with this much muscle, I'd have pushed you further in the gym!"
Chris reached out to play with Dominic's giant tool, and Dominic returned the favor with Chris' tiny 4", the two of them moaning as they jerked each other off, big smiles on their faces. Their moans filled the house as they moved onto more intimate things...
***
Jeff couldn't believe what he was seeing as he peeked into Chris' room. The two buddies were going at it like jackrabbits. He actually came in his pants when he watched Dominic explode a huge load into Chris' mouth, skullfucking his best bro to the point where they both almost passed out.
Jeff returned to his room, his crotch a cummy mess and he turned to his new favorite program...