In the past, in my clinical practice, I would use the same thing to settle down parents who were overly emotional about their child's behavior.
Them: "I can't believe they did that!"
Me: "Well, by adult standards children are clinically insane."
Them: "What?!"
Me: "Play with their food, their feces, put everything in their mouths, babble, mess their pants, throw things, etc. If you knew an adult like that you'd call for a wellness check."
It was a great icebreaker.
Aaron