I would be willing to interfere even if there was no sign of distress or pain, if and only if, anyone here can show how the process "that feels good" turns into a mental illness. I showed how it does with verbal abuse and a bit of violence here.  I think it's time for people to back the process they are claiming exists with a simple example. If you can't demonstrate you understand the process, you only believe it. That is faith, not science.