CathInfo.com

I think the biggest problem of our day is that females (including Trads) have been corrupted into either 1) a Disney-land fantasy view of marriage where they can't deal with any hardships or hard work, 2) wanting a career and a marriage both, which leads to chaos, 3) not truly grasping the challenges of motherhood and (maybe) not wanting those challenges (see #1 and #2 above).

I'm not saying that modern marriages are falling apart JUST because of women.  I'm saying that, in the grand scheme of things, the woman usually holds a marriage together (in the early stages) during rough patches, until the man finally "wakes up" and becomes a man.  Men have always been more immature, selfish and commitment-phobic in all times of history.  This is nothing new and the solutions are known because the problem has been around for so long.

But the realities of immature, selfish and lazy women - who aren't really "all in" on the marriage or motherhood - this is not normal, not easy to deal with and far, far more destructive than such qualities in men.  If women are corrupted, so goes society, because a woman who is corrupted affects an entire family, and eventually a nation.  A man that is corrupted usually only affects himself, or others to a lesser degree than women, because man, by nature, is more independent, so his errors are more isolated.  

Would it be fair to assume that if married couples really start thinking of sex as a "debt", things might already be a tad shaky? 

Would it be fair to assume that if married couples really start thinking of sex as a "debt", things might already be a tad shaky?

That's the technical term used by the Church. It's called the marriage debt. Either spouse can demand the debt at any time. It's part of the marriage contract.