A man has a wonderful horse, a good-looking one. But it also occasionally gets very dangerous and vicious. Causes tons of trouble breaks things and so on. So this man goes to the vet and asks what to do with this horse.

The vet says “That’s a very easy problem and I am glad to help you.”

The man says “Oh, it’s great, so what should I do?”

The vet says “The next time your horse is behaving well, sell it.”