Homosexuality is usually contrasted with heterosexuality and bisexuality. The term gay is used predominantly to refer to homosexual males. Lesbian is a gender-specific term that is only used for homosexual females. The adjective homosexual is also used for same-sex sexual relations between persons of the same sex who are not gay or lesbian. Three major forms of homosexual relationships are proposed by anthropologists: egalitarian, gender-structured, and age-structured. Of these, one is usually dominant in a given society at a given time. (See Forms below.) As there are different biological, historical and psychosocial components to sex and gender, no single label or description will fit all individuals. Find articles on sex and gender at sex and homosexuality and transgender. TB is the amazing person that came up with the definition for this bad ass word. TQM.