The secret shelf
When you are fucking a chick doggystyle, and the you slip an ecstacy pill in her poo hole. Then all you have to do is wait 20 mins and you are in for some freaky shit!
Steve: Hey, did that girl you hooked up with last night night at the Gaff push back pretty hard?
Al: Nah, but then I used the secret shelf and she blew my world!
Al: Nah, but then I used the secret shelf and she blew my world!