I don't know that this is necessarily true. Out of myself, my husband, his girlfriend, and her husband, I'm the only one that has any interest in BDSM, and that is purely from a physical standpoint (I like some types of pain). I'm not submissive and I'm not dominate and I have very little interest in that type of dynamic outside of the occasional sex (I tend to switch when it comes up related to sex, it really, truly depends on the partner and even what type of mood I'm in, as once or twice I've topped, for a little while, the most dominant partner I've ever had). My ex-boyfriend is incredibly dominant and yet, even with him, it was a dynamic I was not willing to get into, even though it had been a huge part of most of the relationships he had been in before me. He'd occasionally make comments or act a certain way to see if I'd changed my mind and always, always came to the conclusion that I hadn't, so he didn't push it further.