Well...

Feet are kind of dirty or smelly usually. The idea of taking off someone's shoes and socks and licking their feet is a submissive act. I'm not into bondage or anything, but I like licking a girl's feet and sucking on her toes while I'm fucking her. It's a nice role reversal or contrast to choking them, pulling their hair and spanking them which I also enjoy doing.

Also, I can find any part of a woman's body attractive. I mean what is it that we find attractive after all? Usually it's signs of health and reproductive ability (nice symmetric face, wide hips, etc.)... So yeah, even apart from the sex I like looking at a nice set of hands and feet on an attractive woman.

I guess my question would be: What is there about feet that wouldn't arouse some people?