I wonder if there is a socioeconomic thing going on here, rather than a biological one?
There seems to be a deeply ingrained assumption on this thread that women will want marriage while most men will need to be cajoled into it...except the "good" ones who somehow manage to do it without being told. I find this really curious.
Obviously, there is still a gender pay gap in our society and many women are still financially dependent on men. So there is a financial benefit in marriage for those women while the men pay a financial penalty.
And if that's the set up, I guess maybe it is reasonable for the man to propose because he is the one who stands to lose the most and therefore has to really want to get married in order to make it worthwhile? Whereas it's seen as a no brainer that the woman will want to get married as it's obviously in her economic interest.
Perhaps those of us who are arguing for a less gendered approach to relationships are the ones who are economically in a stronger position? So we stand to gain much less from marriage financially, if at all? (In my case, not at all - quite the opposite, actually).
Consequently, we don't feel the need for any grand gestures from the man to "prove" that they really want to marry us because the cost of marriage to them is no greater than it is to us.
Perhaps the very fact that financially independent women don't need to get married changes the way they approach the subject?
Just a theory.