Manifestations of addition as individual dependency relationships are: alcoholism, drug addiction, eating disorders, sexual and gambling addictions. Addictions also manifest as symptoms of mental ill health, in conditions such as manic depression, obsessive-compulsive disorders, narcissistic personality and phobias. Addiction on the interpersonal plane may be expressed as dependent relationships (co-dependency), such as marriages where one partner cannot function without the other. On the systemic plane, addictive behaviour may be expressed through compulsive overwork and careerism, or dysfunctional and rigid families, where people have lost true self-determination and effectively become zombies addicted to serving societal norms rather than in touch with, and acting on their own true needs, feelings and values.