I've been receiving a lot of good jokes online today. Many knock knock jokes, since apparently today, in honor of kids knocking on doors to trick or treat, today is now unofficially known as "National Knock Knock Day." Who knew?

Here are some groaners:
(Remember, knock-knock jokes don't have to be funny. In fact, sometimes the louder the groan, the more satisfying the joke.)

Knock knock.
Who's there?
Cash.
Cash who?
No thanks, but I would like a peanut instead!

Knock knock.
Who's there?
Doris.
Doris who?
Doris locked, that's why I'm knocking!

Knock knock.
Who's there?
Banana.
Banana who?
Knock knock.
Who's there?
Banana.
Banana who?
Knock knock.
Who's there?
Banana.
Banana who?
Knock knock.
Who's there?
Orange.
Orange who?
Orange you glad I didn't say "banana"?

Knock knock.
Who's there?
Madam.
Madam who?
Madam foot got caught in the door!

Knock knock.
Who's there?
Cows go.
Cows go who?
No, cows go moo!

Knock knock.
Who's there?
Woof woof woof.
Woof woof woof who?
Make up your mind, are you a dog or an owl?

Knock knock.
Who’s there?
Wendy.
Wendy who?
Wendy wind blows de cradle will rock.

Knock knock.
Who’s there?
Dishes.
Dishes who?
Dishes the police – open up!

And, if you're not into knock knock jokes, here's a great but more traditional joke I heard today from my old college friend, Susan Taylor:

Knock-Knock
Who's there?
Adore.
Adore who?
Open up. A door is between us.

Knock-knock
Who's there?
Anee.
Anee who.
Anee to come in, it's cold outside.

A businesswoman is sitting at a bar. A man approaches her.
"Hi, honey," he says. "Want a little company?"
"Why?" asks the woman. "Do you have one to sell?"