Giok,

   I think that's a community kind of thing....homosexuals...more the men I think...referring to themselves and one another as "Queers," kind of like African Americans who refer to one another as the "N" word (Sorry but I really dislike that word). I think that if you are a homosexual man, it would be fine to use that term but not otherwise. Same with the other term...it's for those that fit within the given community.

Michelle