Here are entered works on a person's internal sense of being male, female, some combination of male and female, or neither male nor female. Works on the role or behavior learned by a person as appropriate to masculinity or femininity as determined by prevailing cultural norms are entered under Sex role.
Here are entered works on the sum total of characteristics which distinguish an individual from all others. Works on the specific characteristics, qualities, or traits in which individuals differ are entered under Individual differences.
Here are entered works on the practice of identifying oneself as a member of a racial, religious, ethnic, or other group not one's own by concealing one's ancestry or background.