Since I was little, i've always had some kind of interests that taked a large part of my day: could recognize almost any kind of car, and say the prize. I always drew future car models, and I have hundreds of my car drawings here. After that, I was obsessed by aliens, and i knew evrything about area 51, S4, ufo crashes etc... Now my passion is music and I spend in average 5 hours of my day playing piano.
Are there any other reasons to explain obsessive passions excluded AS ?