There's no accounting for the scientific accuracy of a porn title. So when reference is made to black cum one merely accepts it on matters of faith without explanatory footnote or sourcing of other corroborating academic material. If you don't like that explanation, well, fuck it. Which is what a lot of guys seem to be doing in this movie. Where are the men of yesteryear, you ask? The former pioneers of the wilderness are now exploring the corn smell of rectal mucus and discovering the bleach bubbling out of their fellow man's pee hole. What has history wrought?