Fappy provided some great insights. My trigger is female bare feet. They are everywhere in the summer. I am training myself to not fixate on them, rather appreciate the cute feet and move on.
I am in the same boat. Foot fetish, foot tickling, foot torture, and any sort of bondage involving bare feet have ALWAYS been my kink. It began when I was a young teen and never left me. I have lost relationships over it, lost a job over it, and I am still struggling to this day. Vanilla sex...