Culture or developmental causes
The theory is that from adolescence women are under pressure to lose weight. They often become trapped in a cycle of desperately wanting to diet, then losing control and end up binge eating and gaining weight. This cycle normally starts at around the age of 16. Sexuality plays a role, for example, anorexics starve themselves as a response to sexuality. Low self-esteem normally is a result of failed dieting attempts, which leads to bingeing, which leads to obesity, which leads to dieting: a vicious cycle indeed!