How the bear lost his butt

Once a peasant whent to town and bought himself a bunch of fresh fish. When he went home the fox got to see the fish and decided to have it. The fox ran ahead and lay down on the roadside and pretended to be dead. When the farmer saw the fox he thought it would be a good for a fur collar. He stopped and put the fox in the back next to the fish. When the farmer drove threw the fox one fish after another, as much as he thought he had enough strength to eat. Eventually he jumped by himself and picked up the fish and would go home. Then he met the bear:
- Where did you get hold of all the fish? - asked the bear
- It had fished it from the water, under the ice, - said the fox.
- Please tell me how to do it, so I can fish too, - said the bear.
- I'll do it with pleasure, said the fox. Find yourself a right hole in the ice. You sit on the holes edge and drop down the tail in the water. Then the fish will start biting on the tail. I could not make that much, but you are stronger, you can take more. The longer you'll sit, the more fish you'll get.
- Thank you, it was good that I learned it, - said the bear. Now I'll go and fish.
When the bear came down to the lake he saw a hole in the ice and dropped in his tail. Soon it began to ache in the tail and bear believed that it's fish biting.
- I will not be in a hurry, said Bear to himself, - but let the fish be such that they are many.
Eventually he thought that'll be enough. He got up and pulled the tail as strong as he could. But the tail went of. It stayed in the ice. This is why the bear is now butt - loose.