Chastity means the integration of sexuality within the
person. It includes an apprenticeship in self-mastery.
Among the sins gravely contrary to chastity are mas
turbation, fornication, pornography, and homosexual
The covenant which spouses have freely entered into
entails faithful love. It imposes on them the obligation
to keep their marriage indissoluble.
Fecundity is a good, a gift and an end of marriage. By
giving life, spouses participate in God’s fatherhood.
The regulation of births represents one of the aspects
of responsible fatherhood and motherhood. Legiti
mate intentions on the part of the spouses do not jus
tify recourse to morally unacceptable means (for
example, direct sterilization or contraception).
Adultery, divorce, polygamy, and free union are
grave offenses against the dignity of marriage.