Knock, knock. Who's there? Otto. Otto who? Otto know the drill, open this door!

Knock, knock. Who's there? Sarah. Sarah who? Sarah reason these jokes are so funny!

Knock, knock. Who's there? Fig. Fig who? Fig-ure it out yourself!

Knock, knock. Who's there? Lettuce. Lettuce who? Lettuce in and we'll tell you!

Knock, knock. Who's there? Buttons. Buttons who? Buttons your lip, nobody likes a loud door!

Knock, knock. Who's there? Noah. Noah who? Noah body knows how to open this door!

Knock, knock. Who's there? Bed. Bed who? Bed-der go answer the door!

Knock, knock. Who's there? Tank. Tank who? You're welcome, don't mention it!

Knock, knock. Who's there? Hiker. Hiker who? Hiker down your street to find out!

Knock, knock. Who's there? Ya. Ya who? No thanks, I get my news online!

Knock, knock. Who's there? Ben. Ben who? Ben knocking on this door for ages!

Knock, knock. Who's there? Wanda. Wanda who? Wanda come in and hear a joke?

Knock, knock. Who's there? Graham. Graham who? Graham your ear, I have a joke to tell!

Knock, knock. Who's there? Alex. Alex who? Alex-plain it to me one more time!

Knock, knock. Who's there? Broken pencil. Broken pencil who? Oh, nevermind, it's pointless!

Knock, knock. Who's there? Albert. Albert who? Albert you don't know who this is, that's why I knocked!

Knock, knock. Who's there? Cashew. Cashew who? Bless you!

Knock, knock. Who's there? Henrietta. Henrietta who? Henrietta worm that you ate my sandwich!

Knock, knock. Who's there? Ivan. Ivan who? Ivan to go out with you!

Knock, knock. Who's there? Luke. Luke who? Luke through the peephole!

Knock, knock. Who's there? Robin. Robin who? Robin you! Hand over the goods!