Ethnic subforums, or nylon subforums, upperbody subforum and so on don't really solve the problem.
While they might help those who like a particular kind of scene, they actually hinder those who have broader preferences.
A scene might fall under several different categories: what if a clip included upperbody and lowerbody tickling, with asians, latinas, and black girls?
Would we have to post it several times?
Just choose the main theme?
From my very personal point of view, I'd rather have people clearly state in the thread - or somewhere in the post - the contents of the media files they are posting.
For example, F/F, Feet, Asian. Or M/F, UB, Black on White, and so on.
We have a search function; when I am looking for something specific, I resort to it.
On the other hand, we could ask TT admin to add a script for subcategories: that is, when posting, we could click on radio buttons and define the contents for the clip/pics: location, genders, ethnicity, and so on.
If it could be implemented, it would help people find what they look for, without making up multiple subforums.