Well, you can sleep with a light on.
An extroverted scientist will stare at YOUR feet.
One brightly shines...
It has a dark side, a light side, and it holds the universe together.
Lights out at nine, candles out at ten.
If you sleep with a person, he/she is ur nap-kin.
He finishes her drink EDIT: Apparently this is Conan's joke, so all credit goes to him. I just heard it from a friend of mine and I had no idea.