Marriage = security for most women. I could have all those great things going in the relationship and if that man decided he wanted to up and leave me one day he could so with no recourse. A good relationship is a wonderful thing, but a secured good relationship is infinitely better. Imagine if you as a woman shacked up with a man until age 45, didn't want to pressure him into marriage and then he one day decides he wants to live a bachelor life again. Now I'm old and at a severe disadvantage for attracting new men, and I don't really have anything to show from the relationship I invested so much into.