@Leila78,
I suppose then we disagree on a few things then. Sex has always been a market commodity. And, human sexuality includes what you are considering "transgressive novelty". Many of us enjoy it, and as long as it is consensual and only involves adults, that is none of your business.
I am against attempts to have society at large dictate sexuality. There is a large range of human experience with sexuality-- this includes casual sex, sex for money, polyamorous relationships, homosexuality, gender fluidity, and pornography.
Society has tried to regulated, restrict and control all of these aspects of human sexuality. And it has failed because sexuality, in its many forms, is a powerful part of what it means to be human.
Your one valid point... one that I agree with, is the need to protect children. And we can talk about how to do this. But I think the rest of what you are saying is nonsense. If being covered in feces is something I find exciting, or fun, or stimulating, this is my right. You don't get to control or define the sexuality of other people.
As long as how I express my sexuality is consensual and involves adults, it is none of your business.