One of the biggest fetishes I engage in IRL is raceplay.
As a rich white guy who travels a lot for business, you get a lot of opportunities to meet women of different races for sex. Raceplay is just an extension of that reality; these women often cheat on their husbands when they're travelling for business, and single ones all love the idea of being swept off their feet by a handsome white guy.
It's a fetish, sure, but let me tell you; it's about as real life as it gets.