What's wrong with trying to preserve or even revive the social institutions of the past? I am of the opinion that as energy prices continue to rise, we are going to find that retirement with the kids comes back (this is already starting). If that become the norm, the implications for marriage and sexuality are quite significant.

But the point of my downvoted post is that you can't take an element of culture and assume that it is responsible for other elements. These things form tangled webs, not linear chains of cause and effect.