I don't know of most other black men, but I can only speak for myself: its never a good thing if a hubby gets left out of the picture. Just as a hot wife craves sexual intensity, so too the hubby deserves some sensual gratification. A Black Master is there to enhance the sexual stimulus of the couple. One can't do without the other, or else the hubby might risk losing his wife.
I always ask a hubby to define how he wishes the relationship to be before stepping into anything, that way I know where to tread.