Dark side shmark side. Such constructs are superficial and society-influenced. A child raped by her father isn't due to sexual attraction but due to mental illness. A woman with rape fantasies isn't "dark", she's having a fantasy about being controlled and used by a man or, in most cases, many men...it's perfectly healthy and natural, and more common than you know. The power trip a person gets when they rape someone has nothing to do with sex...the sexual aspect is just used because it is a weakness...a weakness perpetrated and reinforced by our own society! Want to change it? Change society's thinking on the subject of sex, change society's thinking on women, and change society's thinking on pretty much everything to do with right and wrong. Good luck, give me a call when you've managed to do this.
To say that you've seen the impact on your friend's life is moot. If it had happened since she was 2, there's no way you would know what she would have been like without the abuse, all you can do is compare her to others, which doesn't work either because then you start slipping into the usual human laziness method of generalizing everyone. It's only when you know someone very well and then an event happens to them that changes their life...that's the only way you can say with any certainty that you've seen the impact. If this is all the child knows, it's going to be routine for them. It's not right for him to do what he's done (and he should probably be either strung up by his balls or at least committed to a mental institution), but she is still alive and could make something from her life despite the abuse. Only someone who wants to be a victim will play the victim card...I hope your friend isn't like this, I hope she has the sense enough to rise above her past and make something of her life rather than just wallow in self-pity like so many others do. I too was a victim of sexual abuse as a child, but I haven't allowed it to control my life. Too many others do.
You don't have to be female to be a militant feminist. All you have to be is deluded...it's an equal opportunity delusion.