Firstly, I love you, because I was thinking about bringing up this topic.
Nextly, here's me opining. Just what everyone was hoping for, I know >_>;;.
Gender roles in sexuality are obvious, and I'll mention what I think of it altogether.
There will undoubtedly be several fellas here who say, "omg womenz get treated the same as me lulz", because they've never really realized the ubiquitous and subtle ways in which sexual discrimination takes place.
It's different from racism, and here's why: it's not taboo. A guy holding open the door for me and snubbing a dude is smiled upon, and a hospital specializing in only women is smiled upon. It's commonplace to assume a woman has no technological expertise, as much as it's a general assumption that I want kids and like jewelry. It's not a taboo to assume these things--everyone does. You ask a kid if Barbie is meant for girls and G.I. Joe is meant for boys and they'll tell you, 9 times out of ten, that you're right.
What I mean by taboo is that if you were to openly assume that all Mexicans love burritos and all those of African descent are good at basketball, it's racist. But only a select few will call you sexist for carrying the same assumptions about women.
Fact of the matter is, there will always be gender roles. As a hunter-gatherer society at its core, we as a species will always have and fall into gender stereotypes in atleast one way or another. It's the same way in all animals; there is usually very little role-bending or role-sharing excluding very select species, such as the seahorse or the lovebird.
While all races are only different in small ways, women are very, very different from men. We are have different susceptibility to disease. We endure pain differently. We enjoy sex differently. We have a very different skeletal and muscle structure. Our brains are shaped differently and transmit neurons differently. You wouldn't think immediately that a woman is so completely different but it's amazing how much extra stuff is tacked onto that extra appendage of the "XX" chromosomal pair.
As a higher society with less of an emergence on physical needs overall, it is obvious that the lines between genders will blur more than ever, and that's a really good thing. I think I deserve as much money as Johnny Manmeat over there who's doing the same job as me. I think I deserve to join the same clubs as him and enjoy the same tier in society as him.
But I also don't mind the differences, and I don't think it's completely wise to restrict the sexist nature altogether.
Women-centered hospitals are important because, as I said, women are very different physically, and they're usually mostly natal-care and gyno's, anyhow. Women-centered gyms or fitness clubs are needed because we're intimidated by men who have a tendency to leer or judge us. Men are allowed to join these things legally, just most tend to shy away because they fear being perceived as feminine.
On the same token, I don't see a problem with man-centered things, just so long as a woman is still allowed to join if they really care to.
One thing I'm not too happy about, though: Leadership. When I assume leadership roles, I'm often seen as a bossy bitch, even though I'm as mild-mannered and easy to get along with as a ... (Uh, I can't think of an analogy.) When a dude assumes a leadership role, he has "initiative". That's one thing I could really lose and be a lot happier about.
But as for promiscuity, there'll always be a slant on it. Even women pass judgments on other women who "get around". However I think it's improved quite a bit. Used to be a chick couldn't even sleep with another man after her husband died or would be killed for becoming homosexual--now it's definitely a lot more lenient.
Anyway, that's my two cents. (More like ten dollars.)