The Dirty Sanchez is a classic! I'm sure you guys know about The Donky Puncher, but do ya know about The Houdini? It goes like this.
Say I'm fuckin your old lady(thats right me) from behind. Right when I'm about to blow my load I spit on her back. Then when she turns around thinking it was my wad of love. I shoot her in the eye. "whoa where's that come from"?