Funny joke?

One day, the wolf wanted to eat three little pigs. Two of the three little pigs are at the door and one is on the roof. Pig A and pig B are at the door, and pig C is on the roof. Who is pig A, where is pig B and what is pig C? ) So:

Wolf: Who are you?

Pig A: "Yes!"

Wolf: "What?"

Pig A: "What's on the roof?"

Wolf: "I mean what's your name?"

Pig A: "My name is' Who' and' What' is on the roof!"

The wolf asked pig B again.

Wolf: Who are you?

Pig B: "I'm not' who', he's' who' (referring to pig A)."

Wolf: Do you know him?

Pig B: "Hmm!"

Wolf: "Who is he?"

Pig B: "Yes."

Wolf: "What?"

Pig B: "What's on the roof!" "

Wolf: "Where?"

Pig B: "Where am I?"

Wolf: "Who?"

Pig B: "Who is he?" . (pointing to pig head a again) "

Wolf: "How should I know?"

Pig B: "Who are you looking for?"

Wolf: "What?"

Pig B: "He's on the roof."

Wolf: "Where?"

Pig B: "It's me."

Wolf: "Who?"

Pig B: "Who am I? Who is he?"

Wolf: "My God!" " "

Pig A and Pig B: "My God" is our father! "

Wolf: "What, it's your father?"

Pig B: "No!"

The wolf couldn't stand it any longer and sighed, "Why?"

Pig A, Pig B and Pig C: "Do you know our grandfather?"

Wolf: "What?"

Pig A: "No, our grandfather is' why'."

Wolf: "Why?"

Pig A: "Yes!"

Wolf: "What is it?"

Pig A: "No,' why'."

Wolf: "Who?"

Pig A: "Who am I?"

Wolf: Who are you?

Pig A: Yes, I am' Who'. "

Wolf: "What?"

Pig A and Pig B: "He's on the roof."