Pet peeve:
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A. Men are attracted to health, but not to objective health. If we were attracted to objective health, then you would find the same standards across cultures. Rather, men are attracted to the general things which are healthy in each society. In out society, obesity is a greater concern than malnutrition.
B. Girls don’t develop eating disorders to get dates. They develop them because of poor self image, most often caused by their parents not accepting them as individuals, but imposing standards on them. (Like imagine a mother telling a daughter that she needs to be thin for shidduchim. The problem is the mother, not the shidduchim.)