Simple concepts?
Like boxes,pyjamas,pet sleeping arrangements,tv shows,boardgames, household arrangements , what names they use for various things etc? I'm not even getting into the Covid ones.
Basic,simple things that obviously are a matter of what you like and want /are able to do.
So many people recently displaying this faux naïveté, in badly disguised attempt to just say "you're wrong, I don't like it ,you should stop doing it".