I think it is not fair to accuse these guys that way and it is an insult to Asian girls to say that white guys think they could get laid easier dating Asian girls. Alot of Asian girls from the Asian countries are far more conservative than girls in the Western countries. Most wait till they are married before they would engange in any sexual intercourse. But of course, alot of girls have had pre-marital sex there now. I guess my point is, there is no reason to use "yellow fever" as an excuse.
Guys that move to another country just to get girls are pretty stupid, if you ask me. Of course, many Asian girls would probably think they are more attractive than they ever were back in his own country, but dealing with someone from a whole different culture, language and religion is taking relationship to a whole different level.