This is a good, funny example of dumbing down complex scientific ideas — which is what I try to do for a living, just with healthcare information.
The equivalent conversation about pain science:
Well, the nerves—
Already too complicated.
Uh… tissue damage detected by—
Hm, ok. Long ago, it seemed clear that getting injured was always painful…
And now we know that sometimes we can hurt without an injury!
Yeah, pain is weird.