Interesting topic. Taking in consideration a few things that i have readed, saw and even heard (from females even) it becomes hard to use the word sexism here. The whole dominance/ being dominated thing seems to not be a male's exclusive fantasy, considering that many females who i have talked to about it seems to like it rough (one of them even going saying that she likes to be treated like a slave and being abused!), while certain others (less than the first group) seems to prefer it in a more romantical aproach. Anoter thing that i want to add was a research that i have readed a long time ago (sorry that i can't provide a source, i actually forgot where it was). According to it, several women were exposed to different sex scenes, going from the more romantic ones, to scenes of rape and even sex among monkeys! By logic, many women prefered the romantic secenes over the other ones, but biologically, they reacted more positively towards the scenes of being abused (some even more to the monkey business, lol) much different of their claims of not being turned on by them at all.
I am no doctor, but i believe that it comes from our heritages as animals, where the female seeks for the strongest mate to procreate with, and being able to dominate her strongly affirms him as it.
