There are many sex manuals on the shelves of bookstores. They offer advice on being sexier, on giving him what he really wants, on making her wild with desire. Most of them are about as substantive as a filmy piece of lingerie. What is missing is a down-to-earth, realistic, honest book. Betty Dodson, Ph.D., is an international authority on sexual self-help and the author of the multimillion-copy bestsellerSex for One: The Joy of Self-Loving. She has...