Catechism of the Catholic Church
1606 Every man experiences evil around him and within himself. This experience makes itself felt in the relationships between man and woman. Their union has always been threatened by discord, a spirit of domination, infidelity, jealousy, and conflicts that can escalate into hatred and separation. This disorder can manifest itself more or less acutely, and can be more or less overcome according to the circumstances of cultures, eras, and individuals, but it does seem to have a universal character.
1607 According to faith the disorder we notice so painfully does not stem from the nature of man and woman, nor from the nature of their relations, but from sin. As a break with God, the first sin had for its first consequence the rupture of the original communion between man and woman. Their relations were distorted by mutual recriminations; 96 their mutual attraction, the Creator's own gift, changed into a relationship of domination and lust; 97 and the beautiful vocation of man and woman to be fruitful, multiply, and subdue the earth was burdened by the pain of childbirth and the toil of work. 98
1608 Nevertheless, the order of creation persists, though seriously disturbed. To heal the wounds of sin, man and woman need the help of the grace that God in his infinite mercy never refuses them. 99 Without his help man and woman cannot achieve the union of their lives for which God created them "in the beginning."
English Translation of the Cathechism of the Catholic Church for the United States of America © 1997, United States Catholic Conference, Inc.