Question about Psychology of BDSM (with apologies)

[Mumei]

i see that psy...soooooooo not going there..*chuckles* perhaps a specific question would be more in order since her rather ambiguous monologue is leaving us all answering 'wrong'

I hope my previous-but-one post has clarified how it is that I don't mean to say people are simply "answering wrong."

As to a specific question, maybe this from my OP can suffice:

I'm starting this thread to open up discussion of theories of the psychology and psychological origin of this kind of thing. Is it just that "there are different kind of people in the world?" Or are there particular kinds of events or childhoods or whatever that are particularly likely to produce a, shall we say, "BDSM friendly" sort of person? Are there particular personality types drawn to BDSM activities?

I don't mean to limit the thread to the questions quoted here, but they can serve as a nice specific starting place if the need arises.

mumei