Historian Dorothy Ko proposed that footbinding may be an expression of the Confucian ideals of civility and culture in the form of correct attire or bodily adornment, and that footbinding was seen as a necessary part of being feminine as well as being civilized. Footbinding was often classified in Chinese encyclopedia as clothing or a form of bodily embellishment rather than mutilation; one from 1591 for example placed footbinding in a section on "Female Adornments" that included hairdos, powders, and ear-piercings. According to Ko, the perception of footbinding as a civilised practice may be evinced from a Ming dynasty account that mentioned a proposal to "entice barbarians to civilize their customs" by encouraging footbinding among their womenfolk. The practice was also carried out only by women on girls, and it served to emphasize the distinction between male and female, an emphasis that began from an early age. Anthropologist Fred Blake argued that the practice of footbinding was a form of discipline undertaken by women themselves, and perpetuated by women on their daughters, so as to inform their daughters of their role and position in society, and to support and participate in the neo-Confucian way of being civilized.