What happened?!

“Holy shit, dude, what happened?” Buck said, looking at Nathan.
“What?” Nathan said. Then he realized Buck was looking at his cock. Nathan blushed and covered his crotch with both hands.
“Are you a girl?” Buck asked, furrowing his brow. He touched Nathan’s chest, looking, perhaps, for invisible breasts.
“No! I’m a boy… a man, I mean,” Nathan said. “It’s just… small.”
“Wait, what?” Buck swiped Nathan’s hands away. He didn’t seem to have any compunctions about bending over to examine Nathan’s cock more closely, even in the crowded shower. Buck even gingerly touched it, and it twitched. “Holy fuck, dude, that is a tiny cock. Was it like… an accident?”
“What?”
“I mean… did you lose it in an accident or something?”
“No, that’s just… It’s fine. My doctor says it’s fine,” Nathan said. He covered his crotch again.

From The Redneck Ex-Con