Catholic moral principles? Like...covering up for pedo priests?Um, we actually did not have sex before marriage, but plenty since then in my 35 of marriage, but thanks for falsely surmising.
But the way you teach people to act morally is by teaching them Catholic moral principles in the schools from an early grade. Teach them not that sex outside marriage is wrong buy morally WHY. You also do it by getting the government to stop rewarding cohabitating couples financially.
To me, it's amazing the simplest solution to 90% of the world's problems is met by such opposition by the irreligious left.