Gays and the Catholic Church Gerry OShea Thomas Aquinas, the famous Dominican priest and theologian, promoted natural law as a sound basis for ethical teaching. This approach followed the great Greek thinkers and in particular Aristotle who used human reason alone to deduce binding rules of moral behavior. Major problems have arisen as a result of the limitations of this natural law thinking when dealing with sexual morality. It was central to Pope Paul V1's controversial 1968 encyclical Humanae Vitae which banned the use of condoms or the contraceptive pill even for married Catholics, basically because, following Aquinas' model, the moral order dictates that one may not stymie or interfere with the natural procreative purpose of sex. This papal edict was disregarded by almost 90% of Catholic couples as impractical. It has the distinction of being the first Vatican encyclical honored, in Shake...