英语故事：why is the bear's tail short?

One winter afternoon the bear meets a fox.The fox has some fish in his hand,so the bear asks the fox,"How do you catch them?" The fox says ,"Cut a hole in the ice and put your tail in it,then wait.The fish will bite it,and you pull your tail out." "Thank you,"says the bear.He cuts a hole in the ice and puts his tail in it.After some time,his tail aches.He begins to pull his tail. But he can't pull out his tail because the water turns into ice.He pulls hard.But only part of his tail comes out.Since then the bear has a very short tail. hole[hoʊl]: 洞 ache[ek]: 疼痛