As a black man I've never really understood the BBC fetish either. If it just had to do with the size of the cock, that I understand. Maybe it's also cause I'm African and also live in a country that most people have mainly the same skin color. But come to think of it most men seem to make a big fuss about sleeping with a white woman. I still don't get it since I schooled in the US and still didn't develop any proclivities for any particular race. I will admit though I like watching Asian porn but usually on mute. But that's it. It's a weird feeling being sexualized. Like should I be happy or offended lol? If I where to guess though I think it probably has something to do with the history of the world, how blacks where usually seen as lesser. And it used to be taboo to sleep with them. So for the black man it's like internalized inferiority to the white women. And the white women is like a forbidden fantasy. Just a guess though.
It's not about the size because then it would just be called BC fetish and not a BBC fetish. There's also a BWC fetish too, it's a thing but I don't think it's as popular.
I also don't think it's about inferiority, but superiority instead. Because the vast majority of BBC scenes in games are about how the black guy fucks way better and generally satisfies the woman in every way possible.
This game doesn't really fulfill that kink fully though. Yeah you get Lena who becomes obsessed with Jeremy's cock simply cuz its black and big, and the scenes and her thoughts show that. But on the other hand you have Jeremy who isn't as dominating as he should be if he was to fulfill his part of the kink. Instead he is unsure and the one time he gets to enter her he cums almost instantly. Jack does a much better job at fulfilling that role and he ain't even black.
The BWC kink doesn't seem to work when you pair a white man and a white girl either, so it's like BBC where it has to be interracial.
When it comes to the Asian kink, it's only about the women (I've honestly never seen an Asian guy being sexualized as much as black guys or white guys, unless it's a fat bastard.) Asian men are usually more about romance, like someone else before said about the k-dramas and stuff. It's not about fucking the brains out of a girl and leaving her drooling like the other two.
One of the best portrayals of the BBC fetish is in an RPGmaker game called "Secret Dawn". The black guy there fits all the criteria, he's towering and muscular, has a massive cock, and he has a dominating aura just by standing there. BUT, he's also smart and genuinely a good guy and a well thought out character. And the FMC is slowly falling for him. Shame the game has a type of gameplay that annoys many of the people playing it though. Oh and it's NTR, but not really the usual kind.