I don't think having order and society saying, "right you're a boy, and you're a girl" is a bad thing. It is something every culture does, I'm sure with effort it could be avoided, and if it can be, I don't think I'd want it to be. I enjoy that somethings are overtly feminine, I enjoy admiring femininity. Likewise, I enjoy my masculinity and the reality that I can connect with male friends and acquaintances in different way than I can connect with a female mate/partner/companion. I feel like we would lose out on a lot if we were to go out of our way to ensure everything for everyone, and blur the lines of distinction between genders.
The issue comes when people are chastised when they violate those social gender expectations. Some little boys want to play with dolls, so what? Instead we say that this is weird, trip over ourselves in a rush to pry the doll from his hands, and shove a GI Joe in one hand and a Nerf gun in the other. Some men like to wear skirts, and we decide they are either a "flamer" or they are crazy, and we don't take them seriously as a person.
I think I probably vary from Gaffer on this thought, but I do enjoy the fact that there is a distinction between men's clothing and women's clothing. I like that there are clothes designed to look great on a women, and clothes designed to look great on a man. Our bodies do have different shapes, after all. But I think it is about time we got over scratching our heads and declaring that something is afoul whenever someone really like a garment and decide they'd like to wear it regardless of what sex it is designed for.
Especially since this is only a one way turn-style. Women in khakis and a polo, a common male look, perfectly fine. Women in a business suit, another traditionally male look, perfectly fine. Hell, a women dressed in clothing traditional intended for men can be downright sexy, I'm thinking neck ties, suspenders, sweater vests, overalls, baseball caps. Our culture is more than fine with this. But a man puts on a skirt, and the reaction is, "What the fuck? This poor guy clearly has some kind of mental condition."