I don't really have a traditional foot fetish. It generally doesn't turn me on when I see pictures of feet or when I see a guy's feet on the beach or something.
However, it really turns me on when I see a guy licking/sucking another guy's feet in porn. My dick gets hard immediately. It's my favorite kind of porn and I like the thought of servicing a guy's feet myself. Even though I think it's kind of gross. Though when you think about, any kind of sex is kind of gross, licking feet is generally not any more gross than putting your dick into someone's ass.
I think it has to do less with feet though, I think I like the "domination/submissive"-part that it suggests, even though I am also NOT into BDSM stuff, but it has the kind dynamic to it, without getting too "pervy" and "hardcore". It's kind of soft domination play.
I am kind of frightened what deep psychological issues that might reveal about me lol...