I remember one kid in school who went home bleeding from one of those. Brutal. The guy that did it got his a$$ kicked that same day by the kids older brother. He got pummelled.
What do the kids call that nipple twist, I forget.
Anyway, my son came to me when he was about four or five, complaining that his oldest sister was doing that to him, when I wasn’t around.
My advice was to do it back. I said that I guarantee it will hurt her more than it hurts you and that she will never do it again.
I was right. I would have forgotten the incident, except for the fact that my son retold the whole story at my daughter’s wedding.