I'm also old enough to remember riding in the bed of pickups being normal and no seatbelt laws. You could shove as many kids as you wanted in the back seat of a car or ride with them on your lap.
And back to smoking...
Parents could smoke in those cars full of kids with the windows up and no one said a thing about it.
I remember my brother and I were trapped in a back seat with 2 chimneys puffing away when it was cold and windows that went down half way when it was hot
( & in a previous post watching out for cigarette butts coming back in the car through the back window )