..., unless all I have read here above, a cultural one. Money might be a first intention of asian girls, but why relationships often work out one way but hardly the other is the following: Asian culture includes that women are more patient, they have a servicing heart, in contrary Western girls are not only used but almost trained to have a career of "self-realization". The respective men of each culture are used to their cultural way, which means:

For asian girls the great freedom they get with western guys compared to a subservient life with their own countrymen is very attractive, on the other hand most asian men who are used to the servility of their own countrygirls cannot cope with the selfrealization trip of most western girls, neither can those self-centered girls cope with the demands of asian guys for an obeisant girl.