When you take home a girl, start fucking her with her on top, grab her hair and shout rodeo, your mate (who is hiding up untill now) jumps out and starts fucking her in the ass while seeing how long he can stay in her for.
When you have sex with a girl from behind. Before hand, you have a few of your friends hide in a nearby closet. While you're screwing her from behind, you yell "now!". Your friends then jump out of the closet with cameras and you try and stay on the girl for at least 9 seconds.