Knock-Knock

In response to The Daily Post’s writing prompt: “Ha Ha Ha.”

Tell us a joke! Knock-knock joke, long story with an unexpected punchline, great zinger — all jokes are welcome!

“Knock-knock!”
    “Who is at the door?”
“Knock-Knock!”
    “Who is it?”
“Me!!”
    “Me, Who?”
“Me, Him”
    “Him, Who?”
“Who me!”
    “Me, Who?”
“Who am I?”
    “How do I know?”
“Then why do you ask?”
    “Who are you?”
“Who are you?”
    “Open the door, Its the milkman!”