This didn't happen to me, but it's pretty dang funny, I heard it from a friend from my very conservative college. There were students visiting for a campus preview type weekend and this one high school junior was sitting in his assigned dorm room, just chilling. Several guys walk in, one after the other, completely nude to introduce themselves, just to joke with the kid. Then, a guy on the hall who was known for being well hung (about 6" soft) walks in and says "I bet you've never seen a dick like this!"

The 16 y/o kid stands up, droups trou, and says "only my own" and sat down, beating the other guy by at least an inch!