Don was looking for a little action.
He picked up a sweet young thang at the bar and took her back to his hotel room.
Little did he know she was damn near a nymphomaniac. After six times, she was screaming for more. After the eighth time, Don told her that he needed to slip out for a pack of cigarettes.
On the way out, he stopped in the men's room.
He stood in front of the urinal, unzipped, and felt a moment of panic when he couldn't find it.
After a couple of minutes of fishing around, he finally said, "Look, it's OK. She's not here!"