I'd like to propose that only the content format section be used as mutually exclusive categories.  Everything else, except clips, should function as tags.  Without stretching the imagination too much, one scene with  two performers could simultaneously fit the amateur, anal, Asian, bareback, black, fetish, homemade (which sounds like the same thing as amateur), hunks, interracial, oral, and twink categories.  It would be so much easier to find things if we weren't forced to choose just one.