I agree with Cody4U.
Fetishes usually (but not always) involve some kind of erotic objectification, and White culture doesn't fit that, since it is in the mainstream. It is usually the more "exotic" peoples who are fetishized: anyone of any other culture fits that. Latin, Black, Asian, Polynesian, etc. Or it can be an object: Only liking men wearing leather, for example, to the point of excluding every other man who doesn't wear it is a fetish.
And there are many gay men of color who want a White lover ONLY, but that speaks to a perspective of being Black is "less than", meaning 'I think less of myself, so I don't want to be with myself as reflected in the face of another_________(whatever your 'exotic ethnicity') as the person I could fall in love with.'
Saw this a lot in San Francisco, and it is the exact reason Marlon Riggs made the film Tongues Untied. I knew him casually, as he used to frequent Castro Street, but I went to see his film out of curiosity after several White friends relayed to me that they got what I was trying to tell them about dating White men (one of my (White) friends said I only dated White men because that's all he saw me with, until I pointed out that Black men who liked other Black men didn't hang out in the Castro, and HE (my friend) never went anywhere where Black men hung out (they sure didn't go to the Castro to meet another Black man), but that I did, and he didn't see me when I was dating other Black men).
Back to Marlon: his perspective was that Black men needed to not be self-hating.
There will be always be White men who fetishize Black men. There will always be Black men who are, as one poster so crudely - and racist, too boot, put it - are 'so thirsty for White dick.' And there will always be women who only like rich and powerful men. And men who only like blondes (Sylvester Stallone - when he was young and dumb, something he cops to - comes to mind) What's the difference? It's not ONLY color: it's socioeconomic and class-related as well.
A fetish exists in the mind first, and it can be healthy, if it exists within a limited part of your total life experience (like collecting Chinese Tang dynasty art objects), or it can lead you along an obsessive path,such as collecting persons for traits you believe they ALL have (monolithic thinking) which is rarely a good thing.