A woman became allergic to her husband after twenty five years of marriage. She developed pain all over her body every time he approached her. The cause? A pain killer!  The husband was a dentist and his unfortunate wife developed an allergy to the anesthetic he used in his office. There was enough of a residue on his clothing to cause a reaction. The couple was forced to live apart until the mystery was solved. Eventually it was. The answer then was simple. The dentist took off his work clothes before coming home. Presumably, he put other clothing on.
