Addiction is by definition disordered and adverse. Animals have motivation which governs our behaviour, but that doesn't qualify as addiction. It may be more c

Addiction is by definition disordered and adverse. Animals have motivation which governs our behaviour, but that doesn't qualify as addiction. It may be more correct to say that motivation operates at a higher level than intellect. Motivation directs attention and overrides decision. The same mechanisms which make it hard to wilfully stop taking a drug make it hard for you to wilfully drown yourself or starve yourself if you decide to. I'd say that you grow out of addiction simply because your motivational calculus changes. Maybe there's something new from which you can get an influx of dopamine (perhaps new people or activities), or maybe a near death experience with the drug now means the thought of it triggers a noradrenaline response, and the fear overrides the motivation towards it.