Ok . Lots of Asian girls like foreigner . Why? Because Asian guys are very shy. They think the Asian guys are submissive . If you've got a crush on a girl , would you like to tell her face to face? Lots of Asian guys won't do that . Even that do , maybe they'll tell her on QQ or e-mail.
but in East-Aisa culture, men are taught to think more for others and less for ourselves like “kong rong rang li”. men's desire are often inhibited. usually we dare not to express ourself directly. and in new ages,we are expected to be a “gentleman ”in front of a girl. on the other hand ,many guys are afraid of being refused. yes, we are not brave,but we need more tolerance to be brave.
Do not jump up to the conclusion that the characteristics of foreigners are the reasons for them being preferred. Still, there potential crisis need to be concerned, for example, culture differences.