Sexual preference based on race or ethnicity is not racism unless there is an underlying belief of superiority. It might be politically incorrect to state your preference or sexual attraction on that basis alone, but it hardly qualifies you as a racist --- unless you have a belief in racial superiority. If we followed Bongo's thinking, we might make the same analogy about Gay males who are sexually attracted only to males as a gender class. I would not suggest Gay males are sexist because they are only sexually attracted to males as a gender class. However, you would be a sexist if you believed in gender superiority. Being gay does not mean we are sexist if we are only attracted to our own gender.