Three guys are drinking in a bar when a drunk comes in, staggers up to them, and points at the guy in the middle, shouting, "Your mom's the best piece of ass in town!" Everyone expects a fight, but the guy ignores him, so the drunk wanders off and walks up to the bar at the far end. Ten minutes later, the drunk comes back, points at the same guy, and says, "I just did your mother, and it was sw-e-et!" Again the guy refuses to let this get to him, and the drunk goes back to the far end of the bar. "And you know what?" the guy says returning once again. "Your mother was squealing the whole time!" Finally the guy interrupts. "Go home, Dad, you're drunk!"