the picture is named skin, but it is the skin that does not say what it should say, i think this picture should have had a different name, i just think that!
Wrists are never attractive nor are the backs of a person's hands. The arms are placed as if there is something to hide, but this is a nude in recline.
I like the natural posture. I like the lighting. I like the angle. What I don't like is the fact that her breasts are slightly out of focus. In my opinion they should be either completely in focus as the hands are, or more out of focus. Also a little bit of her chin is showing, which does not help either.
i think some better cropping would do this justice. Especially with the bottom where it looks like a chin, or like extra skin is folding over the right breast. Just cropped like half an inch more perhaps?