Hey cybermovies
To be honest, I don't have any other categories that sites like those will fit into. The pantyhose part is fine, but it's not really lingerie & it's not uniforms either
One thing that I could suggest is to make the sites fit into at least one other category - I think I threw one in groupsex because it was 3some & 4somes. Or maybe try to fine all blonde/brunette/redheads or all big boobs.