Male & Female Hansi (Chinese Characters) side by side, with archaic Japanese meaning "Husband & Wife" or married couple. The female character (left) is a nurturer as the artistic aura of the image conveys, while the two characters that symbolize masculinity (right) are a hand holding a hoe and a rice field, the laborer. Courtesy of Wikimedia user AnonMoos.
No one asks this question, but many extremely successful men and women are sexist against the other gender. The reasons that, as far as I can tell, are given for Sexism being bad are mostly flawed. See, we assume that because it has some similarity to Racism (so does the tendency of airlines to charge seniors and kids different prices then adults, and for that matter patriotism) it therefore must be bad, but racism has no basis in the human character and no function in tight knit relationships.
To clarify, by "Sexism" I mean the tendency of people to hold the other gender, or its' perceived attributes, in contempt. I do not mean the tendency to discriminate in the workplace, sexually harass, or worse. These things are acts of Greed, Lust and Violence, are against human rights, law and public safety, and should always be illegal. The Sexism I mean is simply believing that the other (masculinity or feminity, or men or women) is inferior to your own. In other words, Sexism in your mind.
The reason I believe Sexism could be healthy is because it allows you to define yourself and have deep root in your own character, rather then a character imposed from outside. Assuming they practice sexism, masculine women and feminine men tend to look down on man and woman, while masculine men and feminine women tend to look down on the traits, femininity and masculinity, as masculine women and feminine men are criticized for not complying, and must hold their own against society and try to balance themselves, while feminine women and masculine men are defined within those traits and fight those who fight against them. I have no scientific studies on this, but my own personal experience seems to validate what my reason contrives.
It also creates a hierarchy of dominance within the family, preventing fights and working towards the happiness of all. You will have to be careful how you choose your mate, of course, but once you have selected one who is willing to be inferior, and wants to be taken care of, the rest should be easy. Further, as long as you are not trying to force this on someone who is not willing (which never works anyways) there really isn't a moral crime in it, as some people are genuinely weaker in character and want a big strong papa or mama bear who can take care of them. Avoid embarassing them in front of their friends, of course, but otherwise it seems mutually beneficial. I know a lot of strong families have stayed together this way.
Does this actually mean you have legitimate reason to look down on the other gender? No. But then again, can every country in the world really be the greatest?