Instinct of love toward an object demands a mastery to obtain it, and if a person feels they can't control the object or feel threatened by it, they act negatively toward it.
I don't know what its like for most actors, but really clearly for myself acting has always been the fulfillment of personal fantasies. It isn't just art, its about being a person I've always wanted to be, or being in a situation, or being a hero.