I've found several websites specializing in cuckolds, where a black man has sex with a white woman, while a white man masturbates in the background. The white guy is taunted for having a smaller dick, and is generally humiliated while he watches and jacks off.
There is no end to the number of men wanting to do such a porno, judging from the number of these scenes, and the number of men who send in their apps & photos to these websites. They aren't professional porn actors, just regular guys off the street. They are not sleazy, unattractive men, generally they are young, good-looking, and built.
What kind of guy wants to be in a porno, watching a big-dicked black guy having sex with a white woman, while he just jacks off while being made fun of for jacking off and for having a small cock?