The Tritone in Beetle Juice

i was just thinking about this because we just watched beetle juice for the first time witha, with my son and a great musi frstoa. He requested that the movie be turned down somewhat and subtitles be put on because the music was too much for him. There's a lot of stuff in beetle juice it doesn't really hold up, you know. And it has that a beetle juice is wildly inappropriate. The character, yes, he's not a good ghost, and he does not learn anything.