There was once a joke about a wolf and three white rabbits. Rabbit a is called "who", rabbit b is called "what" and rabbit c is called "why" ... this joke.

Pig A is called "Who", pig B is called "Where" and pig C is called "Why". One day, a wolf found them, wanted to eat them, and rushed to pig A. . . . . Wolf: "Who are you?" Answer: "Yes"! Wolf: What? "What's on the roof? Wolf: What's your name? Who am I? What's on the roof? The wolf asked pig B again. Ni, who are you? B I'm not him. Wolf: You know him? B: Mm-hmm Wolf: Who is he? B: Yes. Wolf: What? What's on the roof? Wolf: Where? Where am I? Wolf: Who? Who is he? Wolf; How do I know? Oh, my God. B: God, that's our father. Wolf: Why? Pig abc: You know our grandfather. Finally the wolf committed suicide.