jeez, touchy.  I'm just observing what the rules are in our modern age which seems to get curiouser and curiouser.  We live in a world where everything receives the strictest PC scrutiny for criticism of sacralized victim groups.  Microaggressions, Cultural Appropriation, check your privelage etc etc. Blacks are the ultimate sacred group, to whom all others compare.   But, sexual license has become its own quasi sacred category, helping to elevate the status of gays and trannies.    

So I imagine that under current rules if one fantasized generally about having slaves and calling black women nigger bitches, read novels featuring it in voyeuristic ways etc one would find massive judgments. But if one has a directly sexual fantasy, acted out by a consensual partner with safe words and all the rest, that magically transmogrifies into something acceptable.  

Have fun, fuck away, enjoy the nigger slut and reimburse her generously.  But still, just gotta admit it is kinda hmmmm.