A man named Smith stopped by the doctor's office to see what the doc found
wrong with Mrs. Smith. The doctor told Mr. Smith that he had treated two
Mrs. Smith's that day, and that the secretary had mixed up their records.
"Your wife," continued the dcotor, "either has AIDS or Alzheimer's." Mr.
Smith asked, "How do I tell which one my wife has?" "Take her out in the
woods," said the doctor, "and leave her there. If she finds her way back
home, don't screw her."