"Well, it was like this," said the man. "I was having a quiet  round
of golf with my wife when she sliced her ball into a pasture of cows. We
went to look for it and while I was rooting around I noticed one of
the cows had something white at its rear end.  I walked over and lifted
up the tail and sure enough, there was my wife's golf ball...stuck right
in the middle of the cow's butt. That's when I made my mistake."

"What did you do?" ask the doctor.

"Well, I lifted the tail and yelled to the my wife, This one looks
like yours, honey!"