Luke gazed down at his ripped, muscular body. His hair-dusted pecs were bulging out over a set of cobblestone abs, with a defined set of obliques forming an arrow pointing down to the largest cock he'd ever seen in his entire life. His grapefruit-sized balls were already churning with a sexual desire he'd never even imagined could exist.
Luke's right arm was gripping his enormous cock, his triceps forming a huge diamond shape on his upper arm. Veins snaked up and down his huge forearms, feeding blood to his newly enlarged muscles. He was suddenly snapped out of his dreamy self-appreciation by the realisation that Caleb was standing at the end of the bed, bending over to use the computer. His smooth, muscular ass cheeks were slightly apart and Luke had the sudden urge to explore the firm hole in-between Caleb's beautiful mounds of flesh.
Caleb quietly pushed himself up off the bed, feeling the surging power and hefty weight of his new and improved body with every movement. His massive endowment bounced in front of his hips and as he stepped forward it naturally nestled in between Caleb's ass cheeks. Caleb glanced around to see Luke's new and improved form standing almost a foot behind him. He looked down and was amazed to see a huge, beer-can-thick 11" cock extending all the way from Luke's groin to his ass.
Caleb's new personality hadn't considered bottoming before that point, but feeling the heat emanating from Luke's huge muscle body and the throbbing of Luke's cock against his tight ass was too hard to resist. He angled his hips slightly and attempted to relax, while reaching his own muscular arms back to pull Luke closer. Luke's impossibly thick cockhead stretched his hole until Caleb was about to give up, but then in an instant it popped in. Caleb winced in pain, but soon noticed the intense pleasure that was fast replacing the discomfort. He pressed back towards Luke and an inch of Luke's huge shaft disappeared inside him.
At this point Caleb was overtaken by the increasing feelings of sexual bliss and pressed back further and further, impaling himself on Luke's enormous appendage. They both moaned as the new sensations rippled through their bodies. But then they both felt a change...