English knock knock jokes: I didn't know you could yodel #45

*Knock*Knock* / —"Who's there?" / —"A little old lady" / —"A little old lady Who?" / —"I didn't know you could yodel!"
*Knock*Knock* / "Who's there?" / "A little old lady" / "A little old lady Who?" / "I didn't know you could yodel!"
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