Actually, Dashkova, this is Etcoff's main point, that our notion of beauty is based on principles of fecundity and fertility, especially our notions of feminine beauty. For example, women with a certain hip to waist ratio are considered more desirable than others. Of course I, too, have my doubts whether anthropology is really "scientific" or not. (I think, perhaps, too often not!) However, in terms of studying other cultures, and finding these universal "standards" of symmetry, - this is very interesting and perfectly plausible information.