I also think that people who hang out in kink spaces are more likely to have non mainstream sexual tastes. You are, I would think, more likely to find women who are really keen on fat guys (these women do exist) in these spaces. It's been my experience that in kinky and similar communities (e.g. the poly community) people (both men and women) who are not conventionally attractive are more likely to be sexually successful than they would be outside these communities.