Just looking for normal everyday behaviour that baffles you.
I was at a friend's house the other day and he has two cats, while I was there, he had to clean up after them, spoke about having to wash them, talking them to the vet and they just wouldn't stop groaning for more food. In theory, I sort of "get" why people have pets, but in practise I can't understand it at all. It's inconceivable I would ever have one.
People going online, reading things, but never posting is another. Social media is full of it. I don't get it, at all. If nothing else, it's irritating that you're always left with a false impression on any given subject, because mild-mannered people, which is usually the majority, won't speak up.
Over to you.