Do we live in an age of addictions? Some pass their time in the office, to the detriment of their family life. Others blow their budget on useless and spontaneous buys. Others still crave thrills and sensations, obtained through participating in extreme sports. But is there a link between a drug addict and a person addicted to shopping, sex or work? Are these new dependencies increasingly frequent, symptomatic of our society? Where does pleasure stop and danger begin? Jean Adès is professor of medicine. Professor Michael Lejoyeux is a psychiatrist.