"Knock. Knock"
"Who's there?"
"Sun."
"Sun who?"
"Sun Set."
A: It didn't. It's already on both sides.
Q: How does the sun know that it's time for bed?
A: When the sky starts to get dark.
Q: What is the sun's favorite bedtime story?
A: Slaughter of the Innocents by Jack Ripper.
(The sun is one sick puppy.)
A sunset walks into a bar and the bartender says, "Good night."
