1) When I see an Asian girl with a wite guy, I don't automatically think that the white guy has an Asian fetish. But if he only dates Asian girls, then...yeah... it's a fetish!!! But I also think it's a whole mind set that people get when they think of dating an Asian girl. I think most white guys would consider that Asian girls are more subservient than the rest of the other races.
2) I agree with what Hedwig Potter wrote. When you are raised in an Asian family, there's an unspoken rule that if you are seriously dating someone, then the guy better be either the acceptable Asian race or maybe white. I know it sounds shitty but I think it's true in most cases.