Leif tells a joke

[caveman]

Leif: Knock knock....
Me: Whose there?
Leif: Banana.
Me: Banana who?
Leif: Banana you glad I didn't say orange?


So this joke gets a going over three or four times. I do the normal version of the joke. Then we get this.

Leif: Knock knock.
Me: Whose there?
Leif: Banana.
Me: Banana who?
Leif: Knock knock.
Me: Whose there?
Leif: Banana.
Me: Banana who?
Leif: Knock knock.
Me: Whose there?
Leif: Orange.
Me: Orange who?
Leif: Knock knock....
Me: Whose there?
Leif: Banana.
Me: Banana who?
Leif: Banana you glad I didn't say orange?