What does Bill Cosby do when he can't sleep at night? 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.

What do Santa Clause and Bill Cosby have in common ? They don’t come until you’re asleep.

What’s the difference between what Eminem does and what Bill Cosby does? An “e” at the end

What do Santa and Bill Cosby have in common? They only come when you're sleeping.