Sex sells...too much

I understand the fact that sex sells a little too much in fashion or at least now. Whenever i would stumble upon a nude picture i would always wave it off becasue it's tasteful, right? It's fashion right? It's art, right? Well i'm sure it was, but now there's so much more to handle in your mind, including the kids who actually know what fashion is. What are we supposed to think when we see some of terry richardson's work? Why does fashion always, or a chunk of fashion, return to this when they get bored: