One day a rich man drives pass a open field and he sees a guy standing there eating grass that was about 2 inches long.  The rich man stopped the car and asked the guy why he was eating grass.

The guy replied that he was poor and had no money with which to buy food.
The rich man told him to climb in the car and come home with him, but the poor man said that he had six children in the area also eating grass.

The rich man said that that didn't matter and they were all welcome to come home with him.  As they where riding along in the car, the poor man said that he was grateful that the rich man was going to help them.

At this point the rich man thought for a while and then figured that before inviting them into his car he should have mentioned that the grass in his own back yard was ten inches long.