Throughout the decades there has been distinct changes in the type of female form that is in vogue. Hour glass in the 50s, slim and boyish in the 60s/70s, broader shoulders, large breasts and slim hips in the 80s, waif like 90s, and the current trend for tiny waists smaller breasts and large hips and bums.
As I explained in my previous comment, there is no evidence that those trends have anything to do with men's sexual preferences.
Just as men follow trends in clothes, cars, hairstyles, they follow trends in women. Men want what other men aspire to and they learn what is aspirational from the media.
First of all, appreciation for clothes, cars, and hairstyles is nothing like sexual attraction. Appreciation for clothes, cars, and hairstyles is on a higher cognitive level, similar to appreciation for art. Sexual attraction is in the "older" part of the brain. Erections and orgasms are reflex responses.
Second, I have seen absolutely no evidence among the men I know that they like a woman just because other men aspire to have that women. They seem to very much just like the women that they like, without caring what other men think. Me personally, I could not care less what other men are attracted to, or what other men think of what I am attracted to.