Three Old Men

Bert and Arnie laughed. “What the hell’s a hippogator?” they asked “There’s no such creature.”

“A hippogator”, explained Harry, “has got a hippo head on one end and an alligator head on the other.”

“Wait a minute!” interrupted Bert and Arnie. “If he has a head on both ends, how does he shit?”

“He doesn’t,” said Harry. “That’s what makes him so mean.”