One night, a man rolls over in bed, giving his wife a big grin. She says, "Not tonight, honey. I have a gynecologist's appointment tomorrow. I want to stay fresh and clean." The man, feeling rejected, rolls over and tries to go to sleep. A few minutes later, he rolls over again and asks his wife, "Do you have a dentist's appointment tomorrow?"

 

If he's married it won't be any night.