There were a couple bulls and a couple cows grazing in a field one day. The wind started blowing. The cows went rolling and were blown down to the other end of the field, but the bulls didn't move. The cows didn't think too much of it, got up, shook off, and walked back to where they'd been grazing before.

A half hour later the wind started blowing again and the cows rolled down to the other end of the field. This time the cows were a little bit annoyed that the bulls were still just standing there, but they got up and shook off and walked back and went to grazing again.

The wind blew a third time and the cows went rolling. This time the cows stood up and yelled, "How come every time the wind blows, we go rolling and you bulls just stay right there!?"

The bulls said, "Well...Wee-bulls wobble but we don't fall down!"