I think in white USA culture the Puritan attitude about sex has prevailed, for the most part. Even if only subconsciously. Black culture is founded on a very different principle in regard to human nature. They tend to celebrate expressiveness, dance and other physical forms of joyful expression.
Yes, it's been 50/50 (black/white women) since I was 20. My first black gf was when I was 20. But then I realized before that some had tried to show their interest in me. But I guess I had assumed that they were not interested in white men