Sex

One of my friends made a bet with Brother 1. If he can be nice, and not say one mean thing, for an entire 24 hours, she'll sleep with him. She know's it's impossible.

Brother 1: I was nice the whole day!

Brother 1's friend: No. You weren't.

Brother 1: Doesn't being nice to myself count?

My Friend: No. You need to be nice to everyone for the entire day.

Brother 1: Oh... that's too hard.