>>18131074
>biological factors that come to play here?
Little to none in the case of Europeans, it's a "modern" sociocultural phenomenon, see the Ancient Greek beauty standards, or the Renaissance art, Europeans used to prefer women with more meat on their bones.

>Why do European and East Asian societies idealize slim women as the beauty standard

It's not the same thing though, Europeans like slim women that still look womanly, like pic related.