the real meaning of being a dark

my mom read my journal and sent me with the psychologist.. anyway.. he asked me if i was a dark and why.. i mean, what kind of music i like, what i think about it, etc, etc… my question is for whom concern… who was the first dark person in the world?? the doctor said it was a culture created by some guy in Swedish who commited suicide and also killed a friend.. but i dont know if it’s true.. if anyone have a clue.. post it