The only cow in a small Iowa town stopped giving milk. The people did some research and found that they could buy a cow just across the state line in Wisconsin for $200.
They bought the cow from Wisconsin and the cow was wonderful. It produced lots of milk all of the time, and the people were pleased and very happy. They decided to acquire a bull to mate with the cow to produce more cows like it. They would never have to worry about their milk supply again.
They bought the bull and put it in the pasture with their beloved cow. However, whenever the bull came close to the cow, the cow would move away. No matter what approach the bull tried, the cow would move away from the bull and he could not succeed in his quest.