English knock knock jokes: Howl you know it's really me unless you open the door? #39

*Knock*Knock* / —"Who's there?" / —"Howl" / —"Howl Who?" / —"Howl you know it's really me unless you open the door?"
*Knock*Knock* / "Who's there?" / "Howl" / "Howl Who?" / "Howl you know it's really me unless you open the door?"
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