Every species has its own needs. We can't look at mantis or Dolphins and say, this or that. What we should look at is perhaps our closest relatives the chimps and then our theoretical history. Why were we made this way, what do we do with our bodies now, what did we do with our bodies then and which one has greater significance in which culture. Shelby has a similar point to what I was exploring earlier.
Way back when, men were made for hunting, clearly from our build. Way back when, women were made for rearing children, clearly from their build. That was a long time ago, we no longer need to chase zebras to impress women, to make babies, to continue the species. However if we needed then to impress women to have a family, we still do today, in some strange ways. Shelby's point about the availability of sperm and eggs similify's the issue a bit. The chances that our forefathers had any idea of what happened inside of them is practically zero. Think of it in terms of what each person invests. If I were a woman in prehistory, and I allowed some guy to inseminate me either by force or by consent, what do I have. I have the labor of pregnancy, which as anyone knows is not easy and last for 9 months. Not to mention a child after a delivery that I might die delivering. Any female in her right mind would put up a hell of barrier to any male trying to get some quick action.
On the male's side. If I didn't care, all I wanted was quick fix, and leave the society after being ostrasized, and either get eaten by some nasty prehistoric behemoth, or survive and join another tribe and probably do it all over again.
Both are risky, but for the male being a hunter he is somewhat capable of being on his own and surviving this dilemma. Perhaps a more manageable situation that what the his counterpart has. For the female she has no choice but to be taken care of by the tribe if they so choose, and then has the danger of childbirth and the follow up of raising a child and looking afer herself. Not easy.
So the resistance put up by women then had to be high. Does it anymore, probably not. However I believe these traits are still inbedded in us. It is not easy to just loose millions of years or evolution in 4 decades. Even though we are civilized now, and can do all kinds of things differently. Most of us still instinctualy fall on some of these lines. Therefore I still have to hurdle lots of obstacles before I get a woman to take my approaches seriously. And it's those obstacles that make it a conquest.
Forgive me if I've overstepped my bounds. But I'm just thinking out loud, I don't mean to offend.