It is said that Bai Juyi has two concubines, Pan Su and Xiaoman. Pan Su's mouth is as small as a cherry, and Xiao Man's waist is as thin as a willow. Bai Juyi likes their small cherry mouth and thin waist very much, and she also writes poems in praise, so small cherry mouth and small pretty waist are synonymous with women's small mouth and thin waist respectively. Pan Su and Xiaoman are also famous for this. At that time, everyone knew that Bai Juyi had two concubines: Pan Su with a small cherry mouth and Xiaoman with a waist.
Women always cater to men's aesthetics. Bai Juyi loves his two concubines because they have their favorite cherry mouths and willows. And this is what most men like. This poem written by Bai Juyi was first recognized by men and later became the norm for women. Women are more interested in cherry mouth and waist. Even in modern times, there are still many women who agree with men's aesthetics, even at the expense of plastic surgery to meet aesthetic requirements. The final result is a single aesthetic, beautiful women lose their own characteristics, and so do beautiful skins.
Generally speaking, since ancient times, men's preference for ideal women has also become the aesthetic standard pursued by women, because great poets like Bai Juyi are pursuing cherry small mouth and small waist, and many women are also striving to become cherry small mouth and small waist. This blind pursuit of male love, to some extent, is also the embodiment of women's subordination to men. On the other hand, modern people have more freedom. Some women still regard men's aesthetics as the highest standard, and some women don't care about small waists or small cherry mouths, but only pursue their own aesthetics.