Here is my theory, and I think it's a beautiful WORLD! A BLACKED NEW WORLD ORDER:
White bois enjoy interracial sex and/or cuckold fantasies.
It really is a kink based on a damaged ego, a bad self opinion and a masochistic nature born from a lot of pain and abuse (usually endured during childhood and teenage years). If these psychological problems could be resolved, THEY NEVER ARE....we train our brain to like it for so many years that the neurological pathways are almost impossible to dissolve. "Once you go black, you never go back" is not a lie.
Why so many white males are into this kink? The short answer is : because of a culture that encourages them to hate who they are. At some point during the development of your psyche, your brain managed to turn the pain and the self-hatred into pleasure... and became masochistic. It's just a good ol' survival mechanism, because it was either that or suicide if you didn't have a positive role model around you (you probably did't have one, like millions of young men).