The stereotypical white guy that has an Southeast/East Asian wife/girlfriend is like the comic book guy from the Simpsons - an unattractive white neckbeard loser that was "saved" by an Asian woman eager to be with him when no other woman wanted to. This is becoming more and more popular in the American media. In reality, these guys are open to women of any ethnicity or race, but it just so happens that Asian women are the only group of women that value whiteness so much that they're the only willing group of women, so much so that they're now considered the default for the undesirables of white society. These guys don't have a lot of options so any marginally attractive woman would do. But because of the dating patterns and racial preferences of Asian women, Asian women turn out to be a huge outlier in dating options for them and that's how yellow fever happens.