That is especially true in Germany. Post-Second World War education included that boys showing strength is evil.

I still remember being shushed by the kindergarten teacher when I played with a banana (I used it as a pistol and made shooting sounds). That game was fine with my dad at home (we're from a different culture). I remember a couple of other things like that. For instance in school, fights between boys were shut down quickly and there were no consequences - "it was no one's fault" and violence is evil while at home my dad told me that it is the fault of the one who started fighting and it is fine to protect oneself.

Content marketing for my recruiting startup from here: A more normal understanding of protecting oneself and gender roles was one of the reasons why I moved away from Germany to Switzerland. But there were other factors, too: "8 reasons why I moved to Switzerland to work in tech" https://medium.com/@iwaninzurich/eight-reasons-why-i-moved-t...).

Interestingly, in the modern US, I've heard (no children of my own) that they often consider a fight between two school kids both kids' fault, sometimes even when the target doesn't fight back, which I find ridiculous. "Sorry, kid, you shouldn't have been an attractive target for bullies."