Evolution of Women in Advertising

http://www.youtube.com/watch?v=9CuGfi9I4KA
After watching the documentary "Miss Representation", I began to realize how prevalent the topics the documentary discussed were, and realized they were totally true, and watching it was kind of disturbing. Not only because I'm  a girl, but I hope that many more people could see that this is seriously a problem.
After hunting around the internet for what other people thought about the problem, I found this video a friend reccomended I watch since he were discussing women as portrayed by the media. They told me that it hasn't always been the way it is now, using sex and women as objects to sell almost anything. Women have been used as ways to advertise all the way back to before WWII. But it wansn't always sexual. Some of them actually were empowering women, especially around the 1940's. But around the 1950's, like the documentary portrayed, the advertisers were trying to get women back into the kitchen, since people felt it was "their place".
People have to wonder why this happened. Looking at the drastic changes throughout the decades of women in advertising is undoubtedly different. The models are mostly white, thin women, and as the decades advance closer to the 21st century, we see more and more explicitness with the ads. Especially in the 21st century ads, we see that larger women are being used to advertise products, because the world is undoubtedly facing a weight crisis, trying to open up to all body types. But even so, that was just one ad out of all the others, which all showed skinny women with large chests.
And sexually explicit things now can be used to sell anything. Even a sandwich.
Now we see that it wasn't always as focused on women as objects in advertising, but there was always that subtle hint, now becoming more glaringly obvious and now totally in your face that women are less than men, and they are the only things that matter in our society. A women's job is is give birth, raise kids, cook and clean. I'm not trying to be radical or anything, I'm just trying to question why our mindsets have evolved this way. We could certinaly change it if we wanted to, but sex sells, and people want to make money, so it looks like this is the road the world of media will continue traveling on, unfortunate as it is.