Who has a joke about polar bears?

It is said that there is a penguin whose home is far from the polar bear's home. It will take 20 years to get there on foot. One day, the penguin was particularly bored at home and wanted to find a polar bear to play with. He went out with him, but on the way, he found that he forgot to turn off the refrigerator at home. It's been 10 years, but the refrigerator is about to close, so the penguin went home and closed the refrigerator. After turning off the refrigerator, the penguin set out to look for the polar bear again, which means it took him 40 years to reach the polar bear's home ... Then the penguin knocked on the door and said, "Polar bear, polar bear, penguin wants to play with you!" " "As a result, the polar bear is not here. The neighbor seal told him that the polar bear just came home yesterday and said that he forgot to turn off the refrigerator. Today, he has set off to play with penguins.