Sexual identity is a relatively recent and controversial concept. Common cultural practice and scholarly convention have each developed many of the ways currently used to define and categorize human sexual identity. Some of these focus on sexual orientation, defined as a person's gendered preference in the choice of sexual partners. Viewed in this way, an individual could be defined as asexual (having little to no interest in sex, and therefore no need for sexual partners), bisexual (sexual interest in both men and women), gay (preference ...