All three adults were shocked and horrified and insisted that he must watch it immediately.
Which led me to think, what are other "rite of passage" type films/experiences that one must go through?
He can already quote all the creations of Joss Whedon, so that's okay. He's got the Star Wars thing totally down. So he's good there, too.
He's never done Rocky Horror Picture Show...but that could probably wait until college if no opportunity presents itself before then.