Knock knock.
Who's there?
Boo
Boo who?
Don't cry, it's only a knock knock joke.
Knock knock.
Who's there?
Who
Who who?
What are you, an owl?
Knock knock.
Who's there?
Water
Water who?
What are you doing? Let me in.
Knock knock.
Who's there?
Cowsgo
Cowsgo who?
No they don't! Cows go moo.
Knock knock.
Who's there?
Atch
Atch who?
That's a bad sneeze you got there.
Knock knock.
Who's there?
Jess
Jess who?
Jess me, open the door.
Knock knock.
Who's there?
Steel
Steel who?
Steel waiting for you to open the door.
Knock knock.
Who's there?
Spell
Spell who?
W...H...O!
Knock knock.
Who's there?
Justin
Justin who?
Justin the neighborhood and thought I'd say hello!