Male Jews are often named after their (deceased) grandfathers, and such was the case of a certain respected rabbi, who, as is customary, drank to excess at a Purim celebration, and fell asleep on the floor. The other celebrants conspired to lay him out on his grandfather's grave, reasoning that he would be sure to say something wise when he woke. So they did, and concealed themselves nearby. When he woke, he had a careful look around, and said: "I am either alive or dead. If I am alive, why am I in a graveyard under a tombstone bearing my name? But if I am dead, why do I have to piss?"