Most of this is question and answer. A minor part is case history. All of it is based on Pietropinto and Seminauer's finding (recently published in Beyond the Male Myth) that over half the men in America have cheated on their women, and that two-thirds said they would cheat under certain circumstances. Dr. Bartusis, a trustee at the American Psychiatric Association, takes a point of view on infidelity that is too close to that of Fascinating Womanhood for this reviewer's comfort. Her first idea is that women should confront their partners with suspected or real infidelities. Her second is that such infidelity is somehow linked to female frigidity. ""Many of my patients have unsatisfactory sex lives because the woman is frigid and the man suffers from premature ejaculation,"" she says, never entertaining the idea that a woman can't determine whether she's ""frigid"" or not when her partner has that particular problem. Sex problems at home are undoubtedly one cause of male infidelity. Communication problems are undoubtedly another. But the archaic claptrap dished up here will do nothing to solve either problem for anguished married people looking for answers.