Excellent Good Fair Poor : VIDEOCASSETTES

“Terrific Sex: The Dr. Ruth Video.” Warner. $39.98. Dr. Ruth Westheimer is basically offering the same common-sense advice other therapists have--so why is she a celebrity? Among the reasons: Her elfishly enthusiastic manner seems laughable at first and puts the viewer at ease, her German accent carries both charm and Freudian echoes of authority, and--most importantly--she’s very, very good at communicating a healthy attitude about sex. All those qualities are reflected in this hourlong guide, packed with wide-ranging information that’s presented clearly and leavened with humor. 1/2