Saw this on RPW, but I thought it offered some insight on not only good expectations from women in marriage (LTR) but also outlined sort of why marriages were failing today, and what the cultural change was.
in the past generation we have witnessed the demise of the concept of obligation in personal relations. We have been nurtured in a culture of rights, not a culture of obligations. To many women, especially among the best educated, the notion that a woman owes her husband sex seems absurd, if not actually immoral. They have been taught that such a sense of obligation renders her “property.” Of course, the very fact that she can always say “no” — and that this “no” must be honored — renders the “property” argument absurd. A woman is not “property” when she feels she owes her husband conjugal relations. She is simply wise enough to recognize that marriages based on mutual obligations — as opposed to rights alone and certainly as opposed to moods — are likely to be the best marriages.
Check out part one as well: http://www.dennisprager.com/when-a-woman-isnt-in-the-mood-part-i/