Ben gasped as a sharp pain flashed through his still erect cock. The member started to stir, lengthening in spasms. His cock was mutating in front of his eyes!
A new twitch was followed by a sudden swell of his member growing thicker. It was less and less human by the minute, with grotesque veins becoming visible. Ben gripped his pulsating cock as it went from four inches to eight, then ten. His own touch sent a wave of primal arousal through his body and an uncontrollable throb animated his member. Another painful spasm extended its length to a foot, and Ben felt his huge balls contract.
A gush of thick, yellowish cum erupted from his cock again and splattered all over the keyboard and Chronivac. Ben lost his balance and fell on all fours as feelings of intense pleasure and pain alternated rapidly - his member started pumping more semen out of his body, growing intermittently between each spurt. A puddle of cum was forming on the floor. Ben could not stop his cock from contracting as it extended to inhuman lengths!
Soon the erect member was so long and heavy that its tip hit the floor with a dull sound. The feeling of the cold tiles and sticky puddle elicited another contraction, and Ben let out a loud moan as a huge load of semen splattered everywhere under himself. Looking down, he saw that his penis was shaped very much like a bull's cock now. It had grown to two feet in length, and was showing no sign it would soften anytime soon.
Ben was feeling fainty. He had never experienced any real sex drive before today, but now he had become so horny he could not contain himself. As an unexperienced, naive virgin he felt incredibly embarassed by the situation, and slighty scared. The feeling of shame was also worsened by the fact that, aside from the growth pains, he felt so much pleasure each time he came. But he had made such a mess, and was not even in his room; he wouldn't be able to explain this to his family.
He attempted to stand up; his erect cock tilted forward, its own weight preventing it from pointing straight up. The strain on his groin was almost painful. Ben almost tripped over his lowered pants. There was no way he would be able to put them back on in his condition; he stepped out of them. Once stable his feet, he leaned over the family computer, trying to keep his cock out of the way.
Apparently, he had not saved the changes a second time, so they would hopefully revert in less than one hour. Ben had to make a decision and clean everything up before anyone else came home.