What obvious-to-others things are you surprised by?

I asked my parents about the "when was smoking viewed as bad for you" bit. They said late 1980s to early 1990s. They said no one thought it was bad for you in the 1970s -- maybe a stinky habit, that is it.

I grew up in the 70s, and that’s hilariously wrong. Cigarettes had warning labels in the 60s, and cigarettes were called “coffin nails” long before that.

There’s a line in a film from 1983 called The Outsiders which is like “give me one of those cancer sticks”, so I think smoking was understood to be harmful earlier than that.