Eric contentedly patted his stomach after eating the pan of leftover lasagna, he was sure his room mate wouldn't mind. His mind returning to his previous thought, he quickly snatched up his towel, heading to the bathroom he shared with four other people. Luckily they were all at classes and he'd have the bathroom to himself for a good while, which he took advantage of when he could.
Walking into the bathroom, Eric turned on the shower, adjusting the water to the right temp, nice and hot. Once he was satisfied he stripped and stepped into the shower, grabbing his soap he began to lather up, and stopped...
Something wasn't right, he ran his hand over his stomach, not feeling his familiar slight paunch, instead it was like running his hands over rocks. He looked down, amazed to see a six pack that was tightening before his eyes.
Eric's dick immediately sprang to attention, and he gladly obliged it. Stroking away as he rubbed his other hand over his abs. As he jerked off his chest began to swell with pectoral muscle, his arousal seeming to speed on the changes. His upper arms bulged with muscle, followed by his lower arms, his hands even seemed to get larger. Soon the growth sped downwards, first his quads then his calves swelling with muscle. The floor seemed to get further away as he began to grow taller, his feet growing a few sizes.
Then his dick began to swell as he stroked it, lengthening from its five hard inches until it was ten inches long, and five around. His balls swelled until they were the size of lemons. Itching covered his chest as a pelt of black hair grew in, along with a treasure trail leading down to his thicker pubic bush. Eric's body hair began to thicken all over, as his skin went from a pasty white to a nice bronzed tan. Unable to hold himself back any longer he shot the biggest load of his life all over the wall.
He panted heavily, wondering at the changes that occurred, when a knock came on the bathroom door.