Do media cause individuals to develop negative body images?

I think the advertisement business has a huge affect on people's body image. We see ads all day long about these beautiful, sexualized, idolized, skinny models and I think that it truly affects society and what we think we should look like or be like. And that is a scary thought, that these things affect us so much. And if it doesn't inflict outer pain, it definitely affects our minds. I have 3 room mates all tiny petite girls who are 5'2 and they complain about their perfectly skinny bodies, and it makes me sad that they can't just be content with how they look. And it also bugs me because I'm 5'8 and a little curvier and it just feels like when they criticize themselves they are also criticizing everyone around them. So no one can escape from these body images. You just have to deal I guess and accept you for you and see the beauty in that.