I think anorexia is a metaphor. It is a young woman's statement that she will become what the culture asks of its women, which is that they be thin and nonthreatening. Anorexia signifies that a young woman is so delicate that, like the women of China with their tiny broken feet, she needs a man to shelter and protect her from a world she cannot handle. Anorexic women signal with their bodies "I will take up only a small amount of space. I won't get in the way." They signal "I won't be intimidating or threatening." (Who is afraid of a seventy-pound adult?)