Honestly, both black men and black women at times chase after non blacks because many suffer from the white Jesus complex. With black men it's more of a standard of beauty thing due to Eurocentric propaganda and with some men an attractive woman is an attractive women. Also having a non black girlfriend is seen as succeeding due to the colorism that exist. The thing is that exist within the black community with some. It's seen as trashy to non blacks. With black women it's more of social approval. White men are pushed as the knight in shining armor, romantic, protective, loves to spend money on his woman, and etc. Look at Disney princess movies. Even in the princess and the frog her prince was some arabic man. So there are young black girls who grow up subconsciously and consciously thinking that a white then non black mate is better for them economically and socially.