The Catholic Church continues to teach that sexual love between a man and woman is reserved to marriage. This marital love signifies the vows freely exchanged between each other and thereby reflects the faithful, permanent, exclusive, and self-giving love they have promised to each other and to God. While all sexual activity not just intercourse outside of marriage is sinful, lust is as well. The Catholic Church teaches that human life and human sexuality are inseparable.
Eventually, under the influence of his Catholic Christian mother Monica, Augustine converted to Christianity, and later wrote movingly of this conversion in his Confessions , including details of the sexually-related aspects. We have a lot of work to do. However, married people also practice continence at times: