Sexual orientation is typically divided into at least four categories: heterose
Sexual orientation is typically divided into at least four categories: heterosexuality, the attraction to individuals of the other sex; homosexuality, the attraction to individuals of the same sex; bisexuality, the attraction to individuals of either sex; and asexuality, no attraction to either sex. Heterosexuals and homosexuals may also be referred to informally as “straight” and “gay,” respectively.
According to current scientific understanding, individuals are usually aware of their sexual orientation between middle childhood and early adolescence (American Psychological Association 2008). Homosexual women (also referred to as lesbians), homosexual men (also referred to as gays), and bisexuals of both genders may have very different experiences of discovering and accepting their sexual orientation.
Alfred Kinsey was among the first to conceptualize sexuality as a continuum rather than a strict dichotomy of gay or straight. He created a six-point rating scale that ranges from exclusively heterosexual to exclusively homosexual. See the figure below. In his 1948 work Sexual Behavior in the Human Male, Kinsey writes, “Males do not represent two discrete populations, heterosexual and homosexual. The world is not to be divided into sheep and goats … The living world is a continuum in each and every one of its aspects” (Kinsey 1948).
Later scholarship by Eve Kosofsky Sedgwick expanded on Kinsey’s notions. She coined the term “homosocial” to oppose “homosexual,” describing nonsexual same-sex relations. Sedgwick recognized that in U.S. culture, males are subject to a clear divide between the two sides of this continuum, whereas females enjoy more fluidity. This can be illustrated by the way women in the United States can express homosocial feelings (nonsexual regard for people of the same sex) through hugging, handholding, and physical closeness. In contrast, U.S. males refrain from these expressions since they violate the heteronormative expectation that male sexual attraction should be exclusively for females. Research suggests that it is easier for women violate these norms than men, because men are subject to more social disapproval for being physically close to other men (Sedgwick 1985).
There is no scientific consensus regarding the exact reasons why an individual holds a heterosexual, homosexual, or bisexual orientation. Research has been conducted to study the possible genetic, hormonal, developmental, social, and cultural influences on sexual orientation, but there has been no evidence that links sexual orientation to one factor (APA 2008). Research, however, does present evidence showing that homosexuals and bisexuals are treated differently than heterosexuals in schools, the workplace, and the military. In 2011, for example, Sears and Mallory used General Social Survey data from 2008 to show that 27 percent of lesbian, gay, bisexual (LGB) respondents reported experiencing sexual orientation-based discrimination during the five years pri