Sure, such acts are absolutely nauseating (yet entertaining, remember 2 Girls 1 Cup and the many many prank involving people’s reaction to said video), but criminal? Apparently jurors think so and handed shock video producer Ira Isaacs a guilty verdict.
Here is a snippet from the FBI’s description of his crimes:
The obscene videos included a video approximately two hours in length of a female engaging in sex acts involving human bodily waste…
The libertarian leaning site Reason as a reasonable summation of the matter.