No good writer needs to graphically describe disgusting and perverted sex acts to get a point across. What people read, listen to or see affects their minds. To varying degrees, of course.
What used to be called pornography (and not easy to find) is now sprinkled about in [sic] "literature".
You wrote, "No good writer needs to graphically describe disgusting and perverted sex acts to get a point across..."
Read the Old Testament lately? I'm grateful Moses didn't ascribe to your viewpoint.