It isn't society insisting on this position I believe, but perhaps you and your fiance. These may be conditions each of you find alluring. However, neither a man nor a woman are 'prized objects'' to the other except in the way we might perceive the person we love as being a great gift.
Men and women have taken huge steps in social evolution over the past 70 years and that advancement is more glaring even over the past 30 years. I suspect it will happily continue.
If your fiance is really having to 'fight' to keep you, then something else is going on that might not be healthy to your relationship. If he is jealous with no actual cause to be, and responding to this in defensive postures that are either too frequent or border on physical, then he might also become manipulative, separate you from family and friends, cause harm to you, etc. later on. If he is just enjoying the idea that you are desirable to other men, this might be more a matter of pride and not really a dangerous issue. If you, on the other hand, are giving him reason to act defensively, then you are manipulating him, playing a game that could backfire.
Perhaps these are all issues both of you need to examine carefully and sort out fact from fiction. Be 'real' with each other, open and truthful. If your ideas are not harmonious, difficulty could be down the road.