Feet are an interesting topic in kink. A foot fetish is one of the most commonly known and more 'accepted ' fetishes in the eyes of the public, but it's never really clicked much with me. I can understand the appeal of kissing someone's feet, worship them, or being forced to sniff them as acts of submission and possibly even humiliation. But for me, they are not by themselves sexual or arousing.
When I think about it, I suppose it could come from them being traditionally unclean. The thought...