Married man divorces wife because she confesses after ten years of marriage that she never climaxed. He has an affair with his secretary and she has orgasm every time they make love. He marries her. After three years of marriage she tells him that she never climaxed.
Addendum: he takes his secretary to a shrink, ready to kill her. The Dr.asks him if he ever thought that he had a problem. It turns out that he drinks and has premature ejaculation.