English knock knock jokes: *Knock*Knock* Who's there? Cows go. #14

*Knock*Knock* / —"Who's there?" / —"Cows go" / —"Cows go Who?" / —"No, silly. Cows go moo."
*Knock*Knock* / "Who's there?" / "Cows go" / "Cows go Who?" / "No, silly. Cows go moo."
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