I think her explaination what the attraction is about the BDSM lifestyle is too narrow and too generalised. This is her key sentance to sum up what the attraction is. She says, and she says it from the subs point of view that the:

Quote Originally Posted by Caitlin
'The whole thrill of BDSM is letting someone take advantage of you knowing that they wont.'
Even being taken advantage of in this lifestyle can mean so many things to so many people.

There are some people in this lifestyle, as well as vanillas, who are taken advantage of, and they stay in those relationships because they don't want to loose their significant other. I know I'm talking about abuse here, but I used it is an example.

I think the Doc's statement is too simplified to be a true explanation of the attration to BDSM. I think she generalised too many things. I don't think she had a random sample of people in the BDSM lifestyle to interview, if she had interviewed anyone, to find out what the thrill is, and what it is about the lifestyle that attracts them.