I kind of feel that the term ‘addiction’ is being used a bit freely these days. If you’re addicted to heroin, for example, and you’re unable to access the drug you are sick as fuck for a week. That’s not just a psychological phenomenon, it’s physical too. If a porn addict is unable to access porn I find it hard to believe that they suffer similarly. That said, people manage to mess up their lives pretty profoundly with gambling so perhaps it’s better to define addiction based on the harm done to someone life rather than the consequences of withdrawal.