"[W]hen John Paul II teaches in Familiaris Consortio (FC) that the “language” of contraceptive acts between married persons objectively contradicts the language of marital self-giving, he intends to single out the objective harm that these acts do within marriage and to spouses. But since he taught later in Veritatis Splendor that contraceptive acts are intrinsically evil, semper et pro semper, we know he did not intend his teaching in FC to specifically settle the wider question of whether contraceptive acts are legitimate for non-married persons. If however doubt still lingers as to the scope of the authoritative Catholic teaching on contraception, an appeal to older formulations should dispel it. A penitential manual in the 10th century written by the Benedictine monk, Regino of Prüm, includes all persons, married and unmarried, within the scope of the negative norm: “If anyone (si aliquis) for the sake of satisfying sexual desire or in deliberate hatred does something to a man or to a woman so that no children may be born of him or her, or gives something to drink so that he cannot generate or she conceive, let it be held as homicide” [1]. This text was incorporated into canon law in the 13th century in the form of the decretal ‘’Si aliquis’’. The collection of moral norms in which this is found remained part of Western Catholic canon law up to the twentieth century (nearly 700 years!)."