Those who read TV troupes link might already be familiar with the term but if you don’t from the official fetish fuel wiki link :

“Do you ever watch a TV show, play a game, read a book, etc., and nothing directly sexual is going on, but you're still turned on anyway? That's Fetish Fuel, which is basically when something in a work of entertainment is fueling your fetishes.”

So my question is simple what are your personal fetish fuel examples?