When I was in college we used to have crazy contests at our parties. For example, one was $20 for the first blonde bush. Another time we offered free pizza coupons for anyone who brought two people I didn't know.

Anyway, one time we put up a $20 door prize for the "shortest penis." Late in the evening a guy came and asked who had won. When we told him that (unsurprisingly) no one had entered, he pulled down his jeans, showed us what was actually a pretty good sized flaccid cock and said "I guess I win then. Where's the money. I'm hungry." We paid him off and got a good laugh out of it.