I know the challenge is closed now, but I wanted to contribute the term/words skin hungry. It's something my friends and I used, and I like that it can be sexual, non-sexual, between friends/family, pets, whatever. It's the feeling of wanting to feel another living thing against your skin. I like that it also implies a need, rather than a want. I think all humans feel this need for contact at some point in their lives (if not throughout the entirety), and, like hunger, I believe that it is more than just a desire. It's a basic human requirement.