Knock, knock!
Who is there?
Paul!
Paul who!
Paul light, and gentle, I knock, knock! Open up and snuggle!
I Never break in!
Knock-Knock
Who's there?
Lettuce
Lettuce Who?
Let us make this paper.
Knock-knock
Who's there?
Who, Who
I didn't know you have an owl
Knock, Knock
Who's there?
Ketchup.
Ketchup who?
Ketchup to me if you can, I have your wallet.