" And yet we are told that femininity is in danger; we are exhorted to be women, remain women, become women. It would appear, then, that every female human being is not necessarily a woman; to be so considered she must share in that mysterious and threatened reality known as femininity. Is this attribute something secreted by the ovaries? Or is it Platonic essence, a product of the philosophic imagination? Is a rustling petticoat enough to bring it down to earth? "

― Simone de Beauvoir , The Second Sex