It seems the article and comments are geared towards adapting to a broken system instead of fixing the system. People can't control their sexual desires, so they have premarital sex. Now we have to make premarital sex okay and un-damaging, so let's make up some arguments to support that. And divorce is painful and expensive, and it's bound to happen, so let's not get married but demand everything that marriage entails. Because obviously we're going to be different people in a few years, and what if I decide I don't like him, and what if I just can't stand the way he butters his bread! In short, because I know by nature I'm selfish and undisciplined, I'm going to rework the system to cater to selfish and undisciplined people and expect everything to be great. Because fixing myself is too much trouble, might as well give in and create a new social system to justify my lack of trying.

The social evidence abounds when it comes to the effects of live-in relationships and the negative effects of pre-martial relations. But think of it this way. Think that the end goal is a stable, secure relationship in which children can be raised to become the best people they can. And you have two ways (with infinite variations) to get there. One, you bring two people together that can "commit" enough to have sex, but only want the sex, everything selfish, and no commitment beyond that, and if kids come along it's going to be a big pain, and of course there is less need to actually work things out and put everything into the relationship because hey! you're not married!

Or...

Bring together two people raised to have self-control, put the needs of others before their own--yes, let's put these two people together, let them commit to a lasting relationship, and let them have the goal of raising children, children they actually want, and teaching them too to control themselves and put the needs of the family first.

Think of the strength a child would have knowing his or her parents were, are, and always will be committed to each other and the needs of the family before their own selfish desires? Then think of the social disconnect, the fear of commitment, the doubt of stability a child would have knowing their parent's relationship was founded on their inability to control themselves.

You say, have sex before marriage because trying to control it will only lead to an early, unwise decision to marry. I say, your control is no control at all; you're not truly in control if you can't make a wise decision about marriage before doing it. So, abstinence before marriage, yes, which by logic concludes control before marriage. You say, until I'm mature and able to commit I won't get married, but I might as well have sex in the meantime. I say, you underestimate the damage premarital sex will cause. I promise you premarital sex will do your future relationship no favors. On the other hand, abstinence will give your future marriage much needed trust and confidence, knowing your spouse has controlled themselves and put your before any other.