I don't know how much it's true in America, but here in Europe I see men moving to high paying jobs in already expensive cities (and making the cities even more

I don't know how much it's true in America, but here in Europe I see men moving to high paying jobs in already expensive cities (and making the cities even more expensive for women to move to) and women moving to cheaper cities (where they are able to get job for themselves) as the biggest factor in not having sex. Internet also helped the explosion of long-distance relationships where people are having sex for a weekend in a month even if they are in monogam relationships.