As a man who recently had a pedicure; okay, well I was out with a bunch of friends, mostly female and they all decided to get pedicures and said come on why don't you get one too? So, I bowed to peer pressure. It was actually kind of fun. I didn't feel too bad because I was not the only guy getting a pedicure either.
I do obsess about clean well-kept feet actually. The way I see it, you ought to care enough about your body to stay healthy and keep yourself clean. Not taking care of your feet is like only cleaning the lip of a drinking glass or only cleaning the top half of a dish.
To me it says something about how much a person cares about herself and her attitude towards cleanliness in general. And, yes, filthy feet are a big turn-off for me.