What happens in women in whom were in some way abused is that they need alot more stimulation in the process of sex. At the point of abuse a desensitization occurs where violations violations of their body cause the anterior singulate and amygdala to be constantly activated and later in life this may expressed in frustration and difficult to arouse interest in an other-wise pleasured activity.
Hmmm. I'm aware that there are known cases of individuals with a history of sexual abuse who are then able to sublimate their experiences into sexual play, and to reclaim a sense of control over experience - such as rape or sexual violation - by engaging in rough sex (because don't forget, in BDSM play the sub always has the power to make it stop). Having said that, all my friends who have been raped much prefer vanilla sex because rough play/bondage/SM are triggering for them. Correct me if I'm wrong but I'm not aware of any evidence for the claims you are making, and it's really dodgy to suggest people who are kinky must somehow have a history of abuse and are therefore "damaged". I've never been abused and enjoy BDSM (I switch but prefer to sub). I know several people who like BDSM and not aware of any of them being abused or raped - it's just play.
Going back to the original question: the furthest I've personally gone was rape play, knife play and being pretty seriously belted. But this was in the context of my previous relationship where we were seriously, probably unhealthily sexually obsessed with each other and went to all sorts of extremes. Funnily enough I don't feel the urge to do these things now, a bit of a handcuff-and-spanking-session every month or two with vanilla sex in between make me a happy bunny.
What I would agree about with Spoo, however, is that the excitement threshold might be different in the brain for people who are only aroused by more extreme sexual activities. But this also applies to almost anyone who has a fetish (I mean, many foot fetishists need to sniff a toe before they can get it up, etc) - and can also apply for people who have ADHD and require a higher level of intensity to maintain arousal... IMO it's simply a continuum of the fact that some girls need lots of foreplay or dirty talk to get wet, some are just ready as soon as the action starts. Some like rough, some like gentle.
I mean, what turns us on turns us on, I don't think it's helpful to pathologise it or jump to unfounded conclusions about people's personal histories...