From talking to friends who are into BDSM - people switch roles depending on how they feel. There are some people who prefer to be one or the other, but it's definitely compromisable, and sometimes the distinctions between roles are blurred. So, I don't think we can't really suggest that this is evolution or biology at work if it easily changes depending on someone's mood or attitude toward it. I'm not really sure how someone would determine if females sub more often in general.
Also, I think people might be missing the point of BDSM. The only way in which it's actually a turn-on is if there is 100% consent between all people involved. You talk beforehand about how far you're willing to go, what the safe word is, what positions you're okay with, etc. etc., and if one person wants it to stop, it stops
immediately. Each person has complete power to stop the roleplaying/sex/whatever at any time they feel like it. You get turned on by having control over your sexuality and being creative and capable with it, not having someone dictate it. I feel like this starkly contrasts the whole early-human evolution scenario in which men might go about fighting aggressively over females, and where consent isn't a factor.
If women were really somehow conditioned to find sexual violence in itself pleasurable, they'd have to find rape pleasurable, and rape is never pleasurable. So, I still think the attraction is all about control over one's sexuality.
Also, this thread is making me fairly uncomfortable. Mostly, the idea that people could believe that females derive pleasure from rough sex more often than men do. It just, reeks of rape culture and the automatic assumption that females
want to be aggressively pursued, and that they'll enjoy violent sex from domineering males, thereby justifying male aggression. Do we have data on this? I know it sounds nitpicky but honestly it scares the shit out of me that people just inherently believe that females may be more likely to enjoy sexual violence. As someone who's been sexually harassed repeatedly in the past, and having friends who've been sexually assaulted and raped, I just, can't address this with the same apathetic detachment that a lot of people here are so lucky to have.
And I hate playing the rape culture card, I really hate it, but I feel like it's important to acknowledge in the assumptions we're making here. A self-aware, cultural perspective is essential in scientific discussion.