I discovered why/when i get the urge to seduce. There are two necessary elements for me: (1) the target is susceptible to seduction, and (2) the target has power over me. If those two requirements are met, I will nearly always feel the urge to seduce. If just one of those elements is present, I might think about it once or twice, but the seduction never holds my interest.
Perhaps this is somewhat related: I think I also discovered why someone might rape (I didn't rape anyone, just a dream). The lure of rape is fuzzier to me than the lure of seduction, but there is also an issue of power. The victim is actively rejecting you. The act of rape negates this rejection, denies the victim even that small control over you.
The downside to rape, though, is that the focus is all on the rejection. In fact, rejection is necessary for rape -- if there was no element of rejection, there would be no reason or opportunity to rape. To be a habitual rapist then, you would have to either be rejected all the time (real rejection), or be so insecure and paranoid to think that people would reject you all the time (perceived rejection). Neither way sounds appealing, or even easy to accomplish. Do habitual rapists seek out rejection or provoke it, just to create the opportunity? I'm much too narcissistic to be courting rejection all the time like that. I don't see why anyone else would do it either unless they had a masochistic streak. In any case, I would never do it myself, it's black magic. But now I can sort of see why others do.