I recently came across this article in Australian news source, The Daily Telegraph; Lesbians twice as likely to be obese. The nearly-6000 participant Boston University School of Public Health study concludes that "Lesbians are twice as likely as heterosexual women to be overweight or obese," officially concluding 2.69x, and 2.47x, respectively. Furthermore, "findings indicate that lesbian sexual identity is linked to a greater prevalence of overweight and obesity" and "results... indicate that lesbian women have a better body image than do heterosexual women" (italics mine). Researchers further ruled out the possibility that lesbians may just be more muscular and are confident in asserting that the differences are due to adiposity.
Hmmm... Interesting study, to say the least. However, I feel that it is highly flawed, for a number of reasons. First, I don't think it's fair to claim that lesbians have better body images than heterosexual women. This seems to fly in the face of everything I know and have experienced. I'm not a lesbian but, in my experience, I've not only found other women to be far harsher critics of female bodies than men, but also that women tend to appreciate a thinner look. Case in point: I'm walking with a male friend and I see a girl that looks to be about a size 2. My first thought/utterance? "Wow. I wish I could be that slim." His? "She's too skinny. She has no boobs/curves, etc." Seriously, I've had that conversation more times than I can count. So, based on personal experience, I would think that the study would have found just the opposite - That lesbians tend to have a higher prevalence of eating disorders, because they are trying to impress other women, and women presumably know what women want.
Second, and I'm well aware that I'm stereotyping here, but most lesbian couples I've met and seen have a clear "hotter one." Look at Ellen DeGeneres and Portia DeRossi. Ellen's by no means ugly or fat (and I love her show to death), but Portia is clearly the hot female of that lesbian relationship. I'm not sure why this seems to be the phenomenon, but it does. Perhaps the 6000-person study somehow only tested the "less hot" lesbians who tend to be a little bit bigger.
Third, this goes back to the ol' nature v. nurture argument re: sexual identity... but perhaps these women were striking out with men (even if men want a bigger girl than many women presume, a line has to be drawn somewhere) so they are just "trying out" the whole lesbian thing at the time of the study. I'm just saying... I know quite a few fat hetero girls that are having trouble in the male department. Maybe they should try the whole bi/les thing out.