I think you are attributing too much romantic thought to it when you call it peasant revolt.
It is simply about contrast, the prettiest females being together with the ugliest males, which in turn also makes it about humiliation of the pretty women, assuming it forced. If it is not forced then the theme is rather about how her mind has regressed to a point where she has no standards, which is in a way also about humiliation.
The males being darker skinned is just a signifier of them being low-class.

I agree that it is a twisted wish for revenge, or perhaps simply a sadistic soul, that would particularly enjoy these kinds of works.