This. I once went out with a girl who was a " Weekend Goth " . Wore normal gear for work and no white makeup etc, but when away from work she wore the makeup, had the black hair and was into bands like The Sisters of Mercy, Bahaus etc.
She was sound to start with, but then one night she asked me to " cut " her arms, back, shoulders etc with a blade whilst in the sack, said it was a Goth thing ?.
Needless to say I left rather quickly never to return. Pity as she was very pretty and actually quite sound.