What's your favourite joke?

[ailbhe]

Dara O'Briain's is

What's the difference between a duck?
One of its legs are both the same.

(Old Christmas Cracker joke - I love that).

Among my favourites are

If it takes a man a week to walk a fortnight, how far is it from St Patrick's Day to America?
(As long as a piece of string).

and

Knock Knock (Who's there?)
Banana (Banana who?)
Just banana.
Knock knock (who's there?)
Banana (Banana who?)
Just banana.
Knock knock (who's there?)
Banana (Banana who?)
Just banana.
Knock knock (who's there?)
Orange (Orange who?)
Orange-oo glad I didn't say banana?

And a recent couple from Linnea:

How do you get an alien baby to sleep?
Rock it!

and

What kind of key do you need to open a banana?
A monkey.

The old ones are the oldest, that's what I always say.