Why are lesbians disproportionately overweight compared to straight women? I have no evidence of this but in my experience it seems to be true. Anon,
Yikes -- talk about stereotyping! I don't know about your experience but I've seen and met lesbians of all shapes and sizes and have not seen any indication that most are overweight as compared to heterosexual women. As well, the "butch" stereotype only accounts for a small percentage of gay women. As I've said many times, the gay community is not only very diverse, but most gay people -- male and female -- do not conform to stereotypes, be they "nelly queens" or "butch, heavyset lesbians." These people exist, of course, and are entitled to as much respect as anyone else, but they are hardly the whole community.
I think many people, gay and straight, have trouble getting past stereotypes because A.) they are unaware of how really large (and I'm not referring to weight, LOL) the gay community is and B.) they see gay people as all resembling themselves [if they're gay] or the couple of gay friends they may have [if they're not].
Gay people may have weight issues, but no more so than the rest of the population.