This practical sex guide incorporates, but goes well beyond, marital sacramental theology, and as such will be welcomed by those who want to adhere to Catholic teaching yet still enjoy the passion of sexual union. Psychotherapist Popcak spends most of the book elaborating on the Catholic view of sex, citing various church documents and the writings of Pope John Paul II. He explains why sex is holy, how it differs from eroticism and why it is intended solely for one man and one woman who are married to each other and open to having children. In covering what he calls the good stuff, Popcak says restrictions are few. These center on the One Rule (a man must always climax inside the woman) and Four Pleasure Principles that deal with maintaining continuity between a couple's daily life together and their sexual relationship and respecting the dignity of each partner. As long as these guidelines are followed, Popcak says, couples are free to be creative sexually. He includes information on natural family planning (a Catholic Churchapproved method of spacing births) and advice for sexual problems. Although Popcak writes in a warm, conversational style, he tends to overuse certain catch words and phrases, diminishing some of their impact. Nonetheless, his essential message makes this worthwhile reading. (Apr.)Copyright 2007 Reed Business Information.