I don't see it as the same thing at all. The Bible proscribes roles based on gender, and to me whether a person is Submissive or Dominant has nothing to do with their gender. I do not believe that women are "naturally" more submissive than men, and it actually makes me kind of mad when people suggest that. As Red mentioned, D/s was originally a community of gay men, meaning that a large number of them had to be submissive. We currently live in a world where male domination is considered more acceptable, meaning that fewer women are free to explore their dominant sides.

I don't submit to my husband because I'm a woman, or because I'm his wife. I do because it is what satisfies me as an individual. I'd have the same reaction to someone saying that I liked certain musicians or voted a certain way because I'm a woman -- I feel that that philosophy takes away from the individual agency that many of us have had to fight for over the years.