Any honest consideration of marriage must think about children, the hope of our future. For millennia, people of every generation and of every culture have understood that the marriage of a man and a woman is the central pro-child social institution and the rock of the natural family. Marriage has never been about the relationship of just any two adults. Marriage brings together a man and a woman who unite as husband and wife to form a unique relationship open to welcoming and caring for new life. As the union of husband and wife, marriage is a union open from within to the blessing of fruitfulness. Children are born “from the very heart” of marriage, from the mutual self-giving between husband and wife (CCC, no. 2366). They are the “supreme gift” of marriage and its “ultimate crown” (GS, nos. 50, 48).
There is new video Made for Each Other: Sexual difference is essential to marriage