One Body: An Essay in Christian Sexual Ethics by Alexander R. Pruss (review)

As a professor of moral theology in general and of sexual ethics in particular, I found Alexander Pruss’s largely philosophical account of sexual ethics to be refreshing. As much as I try to dissuade my students from using religious legalism to justify the rightness or wrongness of certain sexual practices, I find it almost impossible to break them of the bad habit of using such phrases as “Because the Church teaches . . .” or “Because the Bible says . . .”. Even when I counter by saying, “The Church teaches that something is good because it is good and not because the Church says it is good, and such goodness is grounded in the natural law and a sound anthropology,” such legalism still persists. And so, to read Pruss’s extensive analysis of sexual ethics using both personalist and Thomistic principles as well as what we have received from divine revelation is a much-needed tonic not only for students of theology and philosophy but for all those interested in discovering the role of human reason and biology in crafting a sexual ethic.

After an introduction, the proper beginning of Pruss’s analysis is found in chapter 2. Here, the author discusses love and its forms with a particular focus on the meaning of agapē in the New Testament. Pruss argues that, philosophically speaking, we should love everyone. But love should not be understood as monolithic. There are various kinds of love: agapē, philia, and erōs. The New Testament understanding of agapē contains the other two, for it is love itself. This kind of love is a love that loves the other as the other is, for the other’s sake, and in a way that is appropriate to that person in the light of objective facts. Moreover, this kind of love is not simply a feeling or an emotion but is concentrated in an action that is an expression of one’s will.

In chapter 3, Pruss takes up the issue of desire. He evaluates desire in two ways: (1) desire and libido, and (2) sexual desire, need, and pleasure. He concludes that sexual desire is not a need in the same way that we desire food, drink, communication, love, and to be loved. Without these latter, human life would be seriously lacking or, in the case of food and drink, quickly cut short. Second, he observes that circumstances may not be appropriate for fulfilling one’s sexual desire. Finally, while human life would be seriously compromised by the lack of food, drink, communication, love, and the need to be loved, abstaining from the fulfillment of sexual desire even over a long period of time would not be detrimental to human well-being in the same way.

Pruss does not imply by the preceding that sexuality does not matter. Chapter 4, in fact, deals with the meaningfulness of sexuality. There are two sets of rules regarding sexuality and its expression. Some rules are moral in nature, like the prohibition against rape. Other rules are customs, for example, the exchanging of rings after the exchange of marital vows. With respect to the moral rules regarding sexuality, Pruss highlights casual sex, sexual assault, gay rights, and romantic love. Apart from sexual assault and rape—both of which lack consent—casual sex, homosexual sex, and romantic love have the following in common, namely, that sex is indeed innately important to human beings and that sex aspires to be romantic in nature. While, as in the case of casual sex, romantic love does not necessarily give rise to true love, romantic love is often the prelude to a deep and unique form of love. Why this is so has to do with the meaning of sexual union.

Sexual union is the topic of chapter 5, presented under the title “One Flesh, One Body.” Scripture, Pruss affirms, describes the person as...