Ah, a little gratuitous rudeness from Neutron, just to keep our faith up in humanity's constancy. Heaven forfend anyone should discuss a topic he isn't interested in.
As for feet, I know why I've always been drawn to them. When I was an adolescent, first getting really interested in girls (and tickling them), bare feet were just about the only female part I ever saw exposed. That made them an object of attention. Also, they're just so darned cute... And a LOT of girls I was attracted to seemed to go barefoot a LOT of the time. I even saw a fair amount of foot-tickling in high-school (rarely participated, unfortunately 🙁 )