I think he's probably a misfits fan. The haircut is called a devil-lock. They sing about murder and such:
Too much horror business
Driving late at night
Psycho '78
My bathroom is new
You, you don't go in the bathroom with me
Psycho '78
12 o'clock, don't be late
All this horror business
My mirrors are black
You don't go in the bathroom with me
With you
I'll put a knife right in you
I'm warning you
I'll put a knife right in you
I'm warning you
I'll put a knife right in you