Greg was frantically stroking the huge dick between his legs, unable to get his hands around it all he could do was run his hands down the three foot length. With Greg's attention occupied, James pulled out another small device, aiming it in the stud's direction. A small beam of light shot out and struck him, but with all his attention on trying to get off, Greg didn't even notice.
James watched carefully, licking his lips in anticipation. A small bump appeared on Greg, a few inches below his meaty pecs. The bump swelled ever so slightly, the skin darkening on and around it becoming a second set of nipples. Muscle began to bulge under them, swelling into another pair of pecs, directly below Greg's original pair. Growths appeared on his sides, slowly pushing outwards. Soon there were another pair of round muscular shoulders beneath Greg's arms.
Greg still seemed oblivious to the changes, even as the growth continued, arms beginning to grow from his newly formed shoulders. As it grew down to the elbow, the new biceps and triceps swelled in size to easily match Greg's original arms, and even as the forearms grew and gained muscle, Greg just kept desperately trying to stroke his shaft. It was only when the growths split into five directions, finally forming a pair of meaty hands did the new arms start moving. The second pair of hands moved to his cock as well, two hands stroking the shaft, a third rubbing the head and the fourth hand massaging his melon sized balls.
Greg moaned and grunted, closing his eyes, his back arched. With a loud grown of pleasure his cock spasmed, shooting a stream of cum all the way to the ceiling, splattering the thick seed all over. More and more came, splattering the wall, Greg's four muscular pecs some even splashing James. With a gallon of cum spread all over the room, Greg finally relaxed going limp on the bed.
James took some of the cum with his fingers, tasting the salty liquid still watching Greg. After a few moments Greg lifted his hands, holding all four in front of his face, and screamed...