heterosexual

Heterosexual is a sexual orientation characterized by enduring romantic and sexual attraction to people of the opposite sex. The term is often used interchangeably with “straight.” In research and clinical literature, heterosexuality is one dimension of human sexuality, alongside other orientations such as homosexual, bisexual, and asexual. Definitions typically emphasize both sexual attraction and identity, though individuals may differ in how they label themselves or how they experience their attractions.

Etymology: The word derives from the Greek heteros, meaning "different" or "other," combined with Latin sexus, meaning "sex." It entered English through 19th-century scientific and medical discussions of sexuality.

Prevalence and social context: In many societies, heterosexuality is the majority or normative orientation and has historically been linked to heterosexual marriage and family life. Attitudes toward heterosexuality are shaped by culture, religion, law, and social norms, and levels of acceptance of other orientations vary across contexts and over time.

Variation and terminology: People may identify as heterosexual while engaging in occasional same-sex behavior, or may experience romantic attractions that differ from their sexual attractions. The term "straight" is common in everyday language. Some individuals identify as heterosexual for cultural or personal reasons even if their attractions are not exclusively opposite-sex.

Relation to other concepts: Heterosexuality is one of several possible sexual orientations and is distinct from romantic orientations, gender identity, and sexual behavior. Scholars emphasize the diversity and fluidity of human sexuality.