Curb your Enthusiam joke:::Two guys in their mid-twenties are sitting at a bar having a beer.

One of the guys remarks to the other, "Boy, you look tired!"

His friend replies, "Dude, I'm exhausted. My girlfriend wants to make love all the time - three, four, sometimes even six times a night! She wakes me up at all hours. I don't know what to do!"

An old gentleman in his seventies, sitting a few barstools down, overhears their conversation.

He looked over at the two men and, showing the wisdom of his age, said, "Marry her, that'll put an end to that nonsense!"