Jon, felt a slight tingling in his chest. He tore off his shirt and looked at his chest. He witnessed the discoloration of his nipples, begin to stretch and grow across his chest.
Horified he watched the brown area consume his chest. Jon decided to close his eyes and wait it out. He felt stretching and pulling for at least five minutes.
When it appeared to stop, Jon looked down again and gasped. His entire chest had become the color of his nipple and the actual nipples had thickened and grown about an inch outward.
He touched them. They didn't feel any different. They just seemed bigger, that's all. No erotic feeling spread throughout his body. No uncontrollable urge for sex. They just felt like normal male nipples.
He pinched one. "OW" he cried out. Massaging that nipple, he told himself never to do that again. And of course, being a teenage boy, the first thing that popped into his mined was TITTY TWISTER! He shuttered. Better make sure nobody does that to him.
Still massaging himself, he looked up at the two girls that still occupied his room with him. If his nipple were this big and sensitive, he wondered how their's were...