Here is a detail from a fashion photo:

Click to enlarge.
  • Click to enlarge.

Here is a detail of roughly the same area, without retouching:

Also click to also enlarge.
  • Also click to also enlarge.

The internet is full of these sorts of before-and-after images, but these rollovers for some reason really hammered it home to me: Fashion photography is less about actually photographing a human being and more about sculpting pixels.