That is because of the ingrained stereotype. It will be difficult to erase years of misled gender qualities. Thinner women appear attractive because society has a specific image of how a woman should look. Why is it that we do not have the same specifics for grading men's beauty? Bodybuilding became a reference to male attraction less than 200 years ago. However, women's attraction has been judged by their weight for as long as patriarchy exists which is like forever.