"Knock Knock - Nebraska" joke

Does a dolphin ever do something by accident? No, they do everything on porpoise!

What did Cinderella Dolphin where to the ball? Glass flippers!

What is a dolphin's favorite TV show? Whale of fortune!

Knock Knock
Who's there!
Warren!
Warren who?
Warren peace is a famous Russian novel! Knock Knock
Who's there!
Warren!
Warren who?
Warren my birthday suit!