I'm loving the interpretations of that joke. Since it wasn't entirely clear, I'll now explain it. The reason I'm going to do that is that it will make it funnier, as I have explained why it was funny in the first place. The spoiler was representing the colour black. I was saying I like my coffee black, which is a kind of coffee, and I also like my people black. In other words I was saying I like black people. This is quite an old joke, which is what the format of joke was based on, and therefore this was a funny cryptic joke to make.
I hope my explanation is clear to all of you. I for one don't understand what I just typed.