...happened for me the other night, sitting around the polyamory dinner table.
It was just the normal family at the table -- Maya, Mommy, Daddy, Mama, and Uncle Barry. And it was just a normal family dinner until Maya asked what jealousy was. The word and the subject had come up in school, and she was wondering what the term meant, and why people get jealous. We spent over five minutes trying to explain it to her, but in the end we could tell that she didn't get it. She'd never seen it before, at least at home, so she was having difficulty with the whole concept. Good for her.