I think that in many cases, a demand is created by suppliers, a trend/fashion is created by the fashion elite. And there are always more than enough people who will buy the latest fashion, the latest goods/gadgets just because they don't want to be out of fashion, their neighbour has one too.
As for Twiggy like women in fashion and media, I wonder if those Joe Blows really like them or just say that, they don't want to admit they really prefer more voluptious women, just because fashion dictates it.
Or perhaps they are just gay?
