No, society dictates that women are inferior to men, and, as such, saying that a male has female traits is an insult. For example, saying that a man can't drink as much, that he has a vagina, or even that he likes men are ways of assigning female traits to males in order to insult them.
Actually, nature originally dictated it, and society followed. To be honest, I'd like a stay home wife to raise my kids, just because that's been the way of our species even pre-Neanderthal, and I've always believed that sticking to the most natural way of living will be the best for anyone involved. Most species for that matter. I'm not saying women are mentally inferior, I have no idea. I'm just saying that due to survival of the fittest, and men having a greater need for intellect while hunting, there's always a chance that men are in some way mentally superior. We already know we're physically superior (gain muscle mass easier), so why should this be any different?
While I think it's reasonable to want a stay at home wife, I'd be very careful invoking "nature" as justification in most situations. First, what is "natural" is not necessarily moral or in the best interests of society. Everything we do is natural, how can it not be? Even the most dispicable, seemingly unusual things people do are instinctual.
Everything is natural, and therefore nothing is justified solely on the basis of being natural. Also, you could argue that the feminist movement is a natural development, (just as much as anything in human history is), and the fact that their movement is making progress is an example for "survival of the fittest".
Besides, in early history there are many examples of human matriarchal societies. The Jewish people are a well known example of this. I also think that early natives of South America were part of a class structure where women were essentially in complete control of anything most consider significant.
