How did this joke come from?

It is said that the word cold joke comes from such a classic cold joke: one day the little penguin asked his grandmother, "grandma, grandma, am I a penguin?" "Yes, of course you are a penguin." The small business asked his father again, "Dad, Dad, am I a penguin?" "Yes, you are a penguin. What's wrong? " "But, but why do I feel so cold?" There is another version: A polar bear stays in a daze on the ice, and when he is really bored, he begins to pull out his own hair, one ... two ... three ... and there is no last one left, and suddenly he screams, "It's so cold! ! "People will tell this joke: It's so cold; Then slowly, the word "cold joke" came into being.