I dunno. Ask the AC Fan Club.
When I was young and single and more "curvaceous" than I am now, I would go to clubs with my skinny, flat-chested friends and they'd get approached by the white guys, while I was approached by the black guys. I was the lucky one because we all know that white men can't dance. ;-)
I don't want no AIDS looking women but I would prefer their folds be in the sheets, not on the belly stomach.
A lady I know thinks it's because of the prepoderance of male homosexuals in the fashion industry. Everybody has some preconcieved notion of beauty, theirs ends up looking like teenaged boys. Skinny and tall.
And THAT, is HHO (Her Humble Opinion).
(Must say though, I tend to agree. Marilyn Monroe wore a size 12, for crying out loud!)