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.
Anyone who thinks that graphically describing with a view to titillate and MENTIONING are the same has an axe to grind.
There is a difference between, say, the Venus de Milo, and a blow up sex toy. Or between the play "Romeo and Juliet" and a porn movie showing teenagers fornicating.
If you don't see the difference, then nothing I can say will help.
And describing forbidden sex acts so that people know what's what is not the same as describing them in a salacious manner.