Clinical psychologist Dr Tanya Byron asks if we are a society addicted to the idea of addiction. Hearing controversial views from those who believe we are in danger of absolving weak and selfish people from taking responsibility for their own choices, she asks how far we should we go with the concept of addiction. Should we believe someone who says they are a sex addict? Or the teenager who claims to be addicted to video games? Tanya examines some unconventional treatments.