A Harvard man and a Yale man go into a washroom and use the urinals. After they are done, the Harvard man stopped to wash his hands, while the Yale man headed for the door.
The Harvard man looked at the Yale man disapprovingly. “At Harvard, we take care to wash our hands after using the lavatory.”
“Well,” the Yale man replied, “at Yale, we know not to piss on our hands.
Thus is hilarious,