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1.
When you hook up with a chick at a party, you bring her into a dark room, proceed to fuck her, and half way through (or if you are really quick) tell the girl you’ll be right back, leave for a sec, then allow your friend to enter and proceed to fucking her. Warning: Room must either be extremely dark or the girl must be drunk enough not to notice the change.

Optional: Get your friend to wait under the bed and after fucking pretend u dropped something while you go under the bed and your friend proceeds to fuck the girl
"Yo me and my bro Chad totally gave this ho a sneaky twin"
by Engh December 07, 2006