The only thing my ultra-conservative father and grandfather managed to do to me was to never ever let them anywhere near their grandchildren.
I also might’ve let my father know how it feels to get thrown through a bookshelf by someone a lot stronger when I got old enough to do so. Suddenly he was a lot less enthusiastic about physical violence. I wonder why. He still managed to fuck up my spine for life when he did the same to me - when I was 12. Took me 6 years and a lot of physio but he’ll never hurt anyone else ever again.
Slaps are what my mother gave me. My father wouldn’t bother with something like simple slaps.
There’s never any reason to hurt your own children. Not one. Parents are supposed to protect their children.