Skin can be seen in various ways, if you show "too much" skin, it can be classified as nudity or unfeminine (for women). I strongly challenge this view, as how a women presents herself is a personal choice, and should not be held back from embarrassment or society on what they do and don't wear. Some like to cover up head-to-toe, and that's fine, but as soon as it's getting to very little clothing, there is a problem.
But at places like the pool or beach, everything changes and it seems that wearing little clothing is normal, and wearing lots of it is quite the opposite.
Makes you think, right?
Also, skin is very unique, it can be blotchy, soft, rough, smooth, pale, dark, tough, sensitive, the list could go on. But the most fascinating thing about skin is it's reaction to objects pressed into it, making patterned imprints on the skin. This happens nearly all the time in women; tight bra under wires and underwear lines are there day after day.
Here are some particularly beautiful and interesting images I have come across with the subject (skin):
Alpine's Music Video for "Hands"