Because many of these people become obsessed with this fetish and takes over their everyday lives. They can't turn it off and it morphs from a tittalating interest into an obsession into this white men are doomed and white women should be used by all black men as breeding stock kind of crap we see. Now the fetish has become a psychological imbalance of inferiority and humiliation that is unhealthy. When we see this my ex wife or my ex girlfriend who has moved on either by their urging, for example "my relationship is failing should I bring in a black lover to fix it?". Or the proverbial "how do I get my wife or GF interested in black cocks or have a black lover?" They never stop to think of the base lunacy of that statement. If your relationship is in trouble, or it is failing does it make sense to bring another into that will draw away the thing that you covert? How about you get the relationship back on track do the hard work required and make changes before you decide to make on of the riskiest decisions you will make in a relationship? So now we have a huge amount of men who have "pushed" or "driven" their spouse away and are still transfixed with the idea and just can't let it go. many people are unable to separate fantasy and physical sex with the emotional side of intimacy. Put that into a failing relationship and you have put a match to gasoline. So we see pictures from 1, 5 or 20 years ago of a failed relationship of the "stalking" emotionally of what was. They have never moved on or recognize that the behavior is both destructive and traps them from moving on to healthy thought.