Everyone has em, right? The real short, to the point, and funny as hell little old jokes? Mine:
An old bull and a young bull are standing on top of a hill above a grazing field. The young bull gets excited and starts tugging at the older bull. “Hey!!” he says, “How 'bout run down there and fuck us a cow??” The old bull looks up and says, “How 'bout we walk down there and fuck 'em all.”
An oldie but a goodie, no? I heard that one from my director who was talking to me about the relationship of Friar Laurence to Romeo in Romeo and Juliet. That makes me like it even more.