Quantum mechanics and all variations of analytical calculus were banned in my house growing up. I had to discover these things on my own by questioning the reality I experience with the errors in classical calculations I had been taught to make.

Never my parents gave me any talks either for power structures or sex. Both topics were already included organically in my upbringing; they only increased in complexity as I grew up.

He didn't, he was never around much and I just ended up learning things through school and the Internet. I like to think I turned out okay anyway, but then again there's me being arrogant so maybe not.

UK here. I don't remember ever getting "the talk" from either parent. There might have been a late attempt that was shut down with "ugh, we learned it all at school already."

Those classes, at some point between 9 and 13, might have cleared up a few school-yard rumours, but I'm really not sure what I knew, what I thought I knew, and what I learned (and unlearned) at that time. It might even have been a year-long, once a week class, but it was a very long time ago now. I don't even remember what the lessons were called, because it wasn't "sex ed". Might have been "Health Studies" or something similarly vague.

As for the subversion of expectation in the OP text, I'm pretty sure we had some lessons on WWII, but I don't think we got into that much detail before I chose to stop studying History. My parents and grandparents certainly talked about the wars, but that was more about them and people they knew during that time rather than the geopolitical and ethical aspects of things. Perhaps a mention of Nazi propaganda from Lord Haw-Haw being on the radio.

Preface: answering the question as you'd expect. OP needs to learn to just say what they mean rather than talk around it and have people guess on the body.

My mom never did, but was open about it. Although visibly uncomfortable and lacked a lot of basic knowledge, she did her best to be neutral and open.

My dad got brain damage when I was young and sprouted bull#### on almost every subject.

At school we had decent sex ed, even if some teachers struggled a bit to keep the class calm. Eventually my interest peaked as it always does: I found a professional online that talks about the subject and followed their explanations and talks, as well as others and other publications.

I was 19. He wasn't a very good father.

I asked him about his novelty "I owe, I owe, so off to work I go" front license plate. We lived in a state that just requires rear plates. I think I was around 8 or 9. That was my first introduction to unearned authority and fucked up nepotistic power hierarchies. He also had a couple good songs about destroying the company store and a few about fortified/bum wines (not an alcoholic himself but grew up around them).

Before the internet made learning about sex easier.... grammar school boys thought that when a girl spread her legs her vagina opened up. Grammar school girls were taught to FEAR the penis. It could ruin your life