“Our appetite for food, and for that matter drink, sexual gratification, material goods are not easy to control because the gratifications of the appetite is so pleasurable. We have to make an effort to restrain them and many of us find it hard to stop eating good food, even if we feel stuffed and know we’re going to regret it later. More than one person has regretted their actions when under the influence of drink or the grip of lust. Few of us know when to say “enough” when it comes to buying things.” Prof. Allen