why children shouldn't parent themselves

After many requests, I gave in and let E watch Edward Scissorhands.  She's a lover of Tim Burton, full of dark humor.  Case in point:

This is a recent scene in her room.  Goth Barbie loving a skeleton.  She's ready for Edward Scissorhands, right?  Wrong.  Very wrong.  Many tears.  Forever changed.  Sadness for poor Edward like I've never seen.  A deep sorrow for his solitude and fierce anger for the awful neighbors and grotesque boyfriend.  Never let me watch another PG-13 movie, Mom, she said with tear-filled eyes.  Yes, ma'am, I said, chagrined.