Jake was 20, not very built or hung. He went to a store and found some condoms, a whole package of different colored ones. His girlfriend was coming over so he knew what that meant. He purchased them and headed back to his apartment. A few hours later they already had dinner and he went to his bedroom, where his girlfriend Isabelle was waiting, only wearing a bra and panties. She was very sexy, however looked average. Her boobs were b cupped at best and her butt was normal sized.
Jake hurried to the bathroom and pulled out his new condoms. They were set in a row with one condom for each color, blue, pink, Brown, yellow, and regular black. First he grabbed a blue one for no reason. Quickly putting it on he felt his dick tingle. He assumed it was nothing, probably just his $5 foot long, which was a half foot long. He stepped out of the restroom and took his clothes off his skinny, not muscular body.
"Lets get started" Isabelle said.
He laid on his back and she got on the dick express, again he felt his dick tingle. She went up and down a few times as the tingling got stronger. Suddenly he felt an UN believable wave of pleasure and he moans like a ghost. Looking at Isabelle she got higher up, almost as if...
Looking back down he moaned again and found that his penis was pushing her up. It kept going, unbelievably long. He guessed he reached more then a foot of length. Isabelle started going faster as Jake felt tingling all around his body. His breathing quickened as he started feeling stronger. His head hit the wall behind the bed, he must've grown to be 6ft 4in, he was 6ft earlier. As this kept going something blocked his view, two square hills in his face. His chest grew two large muscles and hid biceps grew on his arms.
Isabelle realized what happened and stopped. After his growth he was handsome, ripped, and had a larger dick that reached a foot and a half In hardened state.