ACTIVITY ADDICTIONS Another form of mood alteration is through behavior or activity. I’ve already described the ritual and magical behavior that constitutes the ego defense of undoing. Certain obsessive/compulsive ritualized behaviors have the goal of taking one away from one’s fears of certain shameful desires, feelings or impulses. The more common forms of activities that mood-alter are working, buying, hoarding, sexing, reading, gambling, exercising, watching sports, watching TV,