This joke does not work in print, you have to speak it to someone.
Knock knock.
Who's there?
Helen Keller.
Helen Keller who?
(Don't say anything).
Helen Keller who?
...you will get a laugh...ty.
Knock-Knock Jokes
Why is September 11th the best birthday ever? No one forgets it :)
Voldemort: Knock, knock.
Harry Potter: Who's there?
Voldemort: You know.
Harry Potter: You know who?
Voldemort: Exactly!
By the way, why are there no knock knock jokes about America?
Because freedom rings, but they never answer that door.
Enjoy!
Knock knock.
Who's there?
Police.
Police who?
Police stop telling these awful knock knock jokes!
