However, as an intelligent species, I believe it is within our natural rights to exercise some control over when and whether we procreate.
In a sense, we have been duped by evolution - except that, generally speaking, propagation of the species is also within our interest (although in most cases it's not as pressing a concern as wanting to feel good).
In other words, we are driven to procreate (on account of sex feeling good) whether we are concerned about propagating the species or not. The argument could be made that sex is pleasurable because that acts as an incentive for us to have it, which then results in a propagation of the species. The second is procreation, which seems to be the overarching goal of sex, at least from an evolutionary perspective. The first is immediate, and that is pleasure. And the only way to do that is to stop complaining or being insulted whenever a girl expresses herself in a sexual manner. We have to allow it to be an option, so that we can be confident that their decision reflects their true desires. To do that, we have to enable them to express themselves that way. But let's let them decide that, and on a case by case basis. Maybe it's true that women don't like sex, and that girls aren't interested in expressing themselves in these ways, and that's why I don't see it more often. And for these girls, it teaches them to be hypocritical about their feelings and desires. And while this may not always be their intent, this behavior nevertheless reinforces the sexual gender stereotypes - that men are horn dogs and women at best merely tolerate sex. It's the only way they can do it without being subjected to ridicule by their peers and the public at large. I see it a lot - girls who appear to be discreetly exploring their sexuality, but in a restrained way that makes it easy for them to deny that that's what they're doing, and to maintain a stance of disgust and reproach when others respond to their expression in a way that reveals their hidden intent. We ought to encourage women to express their sexuality, and appreciate them for it, rather than telling them (directly, or through indirect behaviors) that they're being 'loose' with their sexuality when they do - effectively shaming them into silence. I think that view is short-sighted, but to the extent that it might be true, the solution is not to silence men, but rather to empower women to speak up. I do hear people complaining about how porn degrades women, and that it's all about how men use women for their sexual purposes. You get gay men who are happy to revel in their sexuality, and straight men who are happy to direct willing women to play the part men fantasize, but where are the girls who are confident in their sexuality and unashamed to express it on their own terms? I see a whole lot of male-centered sexuality, and while I don't have any problem with that, it tends to leave a gap, and I'm curious to see what ought to be filling that gap. It's hard to find girls expressing their sexuality, because girls are conditioned to repress their sexuality, lest they be labeled as sluts.