My parents think that i'm disturbed?

my parents want me to see a therapist because i have an obsession with morbid things. I watch videos on youtube of charles manson, i like to draw pictures of deformed people, i taped up pictures of flipper babies and pictures of people with disfiguring diseases on my bedroom wall, and i keep seeing these disturbing shadow people in my dreams long limbs and melting faces. It's not like i'm some kind of homicidal psycho though, morbid things just inspire me.