Defining Femininity: Crowdsourced Insights On Gendered Facial Features Across Ethnicities.  Facial feminization surgery has become a key component of the male to female transition, with popularity rising exponentially in recent years. Most available studies have looked at single ethnicities and races, and have not garnered sufficient power to well represent the aesthetic and gender defining perceptions of the general population. This study aims to determine which facial features are viewed as most masculine or feminine across biological sex and ethnicity.