I can't speak for anyone but myself, but I agree that the being taken, as you put it is the appeal that mostly draws me to my lifestyle choices, the adrenaline rush and that mixture of excitement ,guilt and fear combined with that feeling I get from being totaly submissive with my chosen partner be it human or dog.
I wouldn't say i want to be raped but definetly turned on by being dominated and challenged.
The main thing I've realized that turns me on about it, is no matter who your chosen zoo partner is, they won't listen to owww stop, or oh easy boy, or even AHHHHHHHH! That turns me on tremendously, if a human partner did that I would just be angry and 100% turned off instantly. That lack of control because of raw animal instinct to breed outweighing everything else, makes its so hot imo. Seeing videos of the bottoms trying to move away to ease the mindless, unchecked, furious pounding, only to be followed instantly by their dominator is the hottest thing ever. Again if a human partner did that (unless concented to) imo they are a shitty person. So for me at least it's def, that raw, animal instinct taking over everything else that melts me. But since you enjoy it from either partner its most likely a subconscious hierarchy thing, which BTW is most often found in more powerful people with men, and less powerful with women. It's also seen in some weaker men, but that often requires a very high amount of abuse, degradation, or made to feel less than others for any or every reason, from a very young age, but it usually needs to be very deep seeded to become a kink. Most of the time, with weaker men its either a huge fear, or its been beaten into them to the point it's seen as normal to them. But like everything with people its not black and white its an uneven rainbow, with certain "colors" making up more of the rainbow than others. Some of that is textbook psychology, and some is things gained directly from the people I've talked to about this subject, both into it, appalled by it, and some in the middle areas.
BTW if you disagree, please post it here, don't flood my dms or my wall to argue about it, I'll probably just block you.