A couple brought a bull to mate with their cow, but were having quite a bit of trouble. They called a local veterinarian. When the vet arrived he made a cursory examination of the beast before asking the couple to describe the problem.
The husband explained, “Whenever the bull approaches our cow, she moves away. If he approaches from the back, she moves forward. When he approaches her from the front, she backs off. An approach from the side, and she walks away to the other side.”
The vet thought about this for a minute and asked, “Did you buy this cow in Michigan?”
The couple was dumbfounded. They had never mentioned where they bought the cow.
“How did you know we got the cow in Michigan?” the woman asked.
With a distant look in his eye, the vet replied, “My wife is from Michigan.”