I have been into women's feet since I was about 12 and I still couldn't tell you what it is about them that drives me so wild. Although for me it is definitely the sight of a nice arch or some pretty painted toes, I've never been one of those weird sock-sniffer types. lol
I find that kissing and licking a woman's foot is a very intimate and erotic thing. I particularly love to run the tip my tongue up a womans sole from her heel and then maybe take a toe or two into my mouth and swirl my tongue around it. Mmmmmm.
I'd better stop before I get carried away! lol