When did you first learn how to tell a knock-knock joke?

Little Ranger has, in the last few weeks, learned the general concept of and made some bold attempts at telling knock-knock jokes.

Here are two recent examples...

LR - "Knock-knock!"

Me - "Who's there?"

LR - "Bucket!"

Me - "Bucket who?"

LR - "Uuuhhh... ah... boo-goo, boo-goo head!"

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LR - "Knock-knock!"

Me - "Who's there?"

LR - "Railroad tracks!"

Me - "Railroad tracks who?"

LR - "Uh, now it's your turn to say 'knock-knock'!"

The boy will have his own Netflix special in no time.

When did you first learn how to tell a knock-knock joke?
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