Professors at Villanova University gathered a group of college-aged women together and showed them ads featuring thin models. Then, as thanks for participating, the women were offered a pack of Oreo cookies. The overwhelming majority said no to the cookies, but they did say they would buy the brands and products that the ads featured.
One researcher said the analysis went something like this: That thin models make women feel bad about themselves, but they like it, and that ads using normal-sized models didn't affect womens' body image, but they didn't like the brands and products that those ads featured either.
This is the reason why us normal men will never understand women. Something makes them feel bad about themselves. So, they like it? They're crazy, man!