If I had a guess it would be because some black people (maybe you) consider white women the holy-grail. This could be due to the taboo in our society, it could be due to the subtle inferiority complex that many black people have.
With that being said, if you feel white women are some type of prize you will desire them stronger than a woman of a different ethnicity. The reason why you may look at a 'trashy white trailer trash" women is because that prize seems easily attainable. Maybe a white women with her shyt together may not show interest because they have the same FALSE ideology of black inferiority.
Basically, wanting a trashy white chick is like wanted a luxury car. The 2013 actually requires some real money so you buy a used luxury car with MORE MILES because it is more in your price range.
:thinking:
JUST MY OPINION. I don't know you personally.