I find the whole notion of QOS fascinating, erotic and empowering for white women. It's also emblematic, pun intended, for something that was originally meant to be degrading that has been turned into something of high value by a subgroup of folks in society. Let's dive in.
Basically, a spade is a digging tool, usually black in color. In times past, Spade was used as a derogatory term to describe black folks. Obviously, a queen is the highest female position of the ruling class of folks in a monarchy. In this lifestyle, a spade is used interchangeably with BBC, again a black tool for digging. In other words, sexually speaking, a black man is reduced to tool used at the pleasure of sexually empowered white women. In Western Society, for the last several hundreds of years, a BBC is a commodity. Something of value not only in the present but also in the future because it could self-perpetuate itself which is exactly why "valuable" male slaves were used as bulls in the antebellum US to breed more of his kind therefore selecting out "weaker" males.
Fast-forward to the present and we see white women declaring themselves queens of BBCs and many husbands insisting on consuming genetic material from fertile black balls as a fetish. As a black man, I don't take offense to any of this and if we're being honest, I'm guilty of being a connoisseur of white women based on their Fitzpatrick skin types. While I don't assign value to this, based on my mood I do have preferences at times. For instance, redheads with ivory complexions are a huge turn-on at times because of the skin contrast created when my BBC disappears into their mystical labyrinth of pleasure. I also love brunettes with beautifully tanned skin so in the final analysis, this current generation of IR players didn't make the rules, we're simply reacting sexually to the world we inherited.