Foot fetishes are usually the result of something physical, rather than mental. They occur from cross-wiring in the brain between the regions associated with feet and genitalia. I saw it on a documentary once. ☺
@Lolco3: http://www.livescience.com/33525-foot-fetishes-toe-suck-fairy.html Here is an article about the doctor who discovered the reason. It was this doctor that they talked to in the film.
