Two guys in their mid-twenties while sitting at a bar:
One of the guys says to his buddy, "Man you look tired."
His buddy says, "Dude I'm exhausted. My girlfriend and I have sex all the time. I just don't know what to do."
A older fellow sitting a couple of stools down had also over-heard the conversation. He looks over at the two young men and with the wisdom of years says, "Marry her. That'll put a stop to that nonsense!"