Weird. I never associated the usage of the word "fierce" with gay men, so I didn't get the joke either. Actually, I associate it pretty much solely with "divas" like Tyra Banks (who's been using it since sometime in the 90's), and Biance (who has renamed herself Sasha Fierce and released a new album by that name). I don't watch a whole lot of TV (especially since we willfully don't have any kind of television service); but, none of the gay men I know personally use that word half as much as most of the women I know, especially younger women.