who are forced into the act by destitution, blackmail or social pressure. Rape is an intrinsically evil act that can cause grave damage to the victim for life. Incest, or "rape of children by parents or other adult relatives" or "those responsible for the education of the children entrusted to them" is considered the most heinous of sexual sins. Homosexuality The Catechism devotes a separate section to homosexuality within its explanation of the sixth commandment. Like heterosexual acts outside of marriage, homosexual acts are considered sins. The Church distinguishes between homosexual attractions, which are not considered sinful, and homosexual acts, which are. The Catechism states that they "violate natural law, cannot bring forth life, and do not proceed from a genuine affective and sexual complementarity. Under no circumstances can they be approved." The Church teaches that a homosexual inclination is "objectively disordered" and can be a great trial for the person, who the Church teaches must be "accepted with respect, compassion and sensitivity ... unjust discrimination in their regard should be avoided." Homosexuals are, according to the Church, "called to chastity". They are instructed to practice the virtues of "self-mastery" that teaches "inner freedom" using the support of friends, prayer and grace found in the sacraments of the Church. These tools are meant to help homosexuals "gradually and resolutely approach Christian perfection", which is a state to which all Christians are called. (Two lay movements represent opposing philosophies regarding homosexuality: DignityUSA seeks to change the Church's teachings to justify homosexual acts; Courage International is an organization of homosexuals who "support each other in the sincere effort to live in chastity and in fidelity to Christ and his Church".) Love of husband and wife According to Church teaching, spousal love is intended to form an unbroken, two-fold end: the union of husband and wife and the transmission of life. The unitive aspect includes the transference of each partner's being "so that they are no longer two but one flesh." The sacrament of matrimony is viewed as God's sealing the consent which binds the partners together. Church teaching on the marital state requires spousal acceptance of each other's failures and faults, and the recognition that the "call to holiness in marriage" is one that requires a process of spiritual growth and conversion that can last throughout life. Fecundity of marriage, sexual pleasure, birth control The Church position on sexual activity can be