|True Stuff: The Ethics of Retouching|
There isn't really much that I can add to this article so you should just go read it for yourself. I'm a big fan of discovering all of the history behind trends that everyone believes to be brand new. This one is a pretty great example considering that the debate of retouching started up almost at the same time as photography. Also, it makes me wonder how many of my relatives had some flaws taken away in those fancy postcard photos.