My daughter is beginning to understand the difference between "subjective" and "objective".
She will sometimes say "That color is ugly!" or something like that. I mentioned a few times that her opinion about that was subjective; that other people might think it was beautiful and neither person would be wrong.
Then I mention that things such as hitting someone who simply makes you mad, or taking something that belongs to someone else, isn't subjective- it's wrong. I have explained that's the difference between "subjective" and "objective". She does seem to be starting to catch on.
It would be (subjectively?) nice if more adults understood that difference.
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