Heterosexuality

Heterosexuality is a sexual orientation characterized by romantic, sexual, or both forms of attraction to a gender different from one's own, classically described as attraction between men and women. The American Psychological Association classifies heterosexuality as one of the normal variants of human sexual orientation, alongside bisexuality and homosexuality, noting that "both heterosexual behavior and homosexual behavior are normal aspects of human sexuality" and that orientation ranges along a continuum rather than sorting neatly into fixed, mutually exclusive boxes (APA). GLAAD's media reference guide similarly defines a heterosexual, or straight, person as one whose enduring physical, romantic, and/or emotional attractions are to people of a different gender (GLAAD).

As a monosexual orientation, heterosexuality is directed at one gender category, placing it alongside homosexuality and in contrast to plurisexual orientations such as bisexuality and pansexuality, which describe attraction to more than one gender (HRC). Sexual orientation and gender identity are separate constructs in this framework: a person's own gender (whether cisgender or transgender) does not determine which orientation label applies, only the relationship between that person's gender and the gender(s) they are attracted to. Because heterosexuality has historically been treated as the unmarked, default orientation in most societies, it was rarely named or theorized as a discrete category until a competing vocabulary for other orientations emerged in the late 19th century.

Examples

Heterosexuality is the orientation least often examined, because it is usually assumed rather than stated, which is where most of the confusion about its edges comes from.

What the term covers. Romantic, sexual or both forms of attraction to a gender different from one's own. It is a monosexual orientation, directed at one gender category, and it says nothing about the person's own gender being cisgender: a trans man attracted to women is heterosexual on the same terms as anyone else. Because the APA describes orientation as a continuum, occasional same-gender attraction or experience does not automatically disqualify a heterosexual identification: heteroflexibility names that asymmetric case.

What the term does not cover. Homosexuality and the plurisexual orientations (bisexuality, pansexuality) occupy the other positions. Heteroromanticism names the romantic axis alone, which matters when the two diverge. Being heterosexual is also not a relationship structure: it implies nothing about monogamy.

How the word is used. "Straight" is the everyday form; "heterosexual" carries the clinical register of its origin. Karl Maria Kertbeny coined it in an 1868 letter, alongside "homosexual", to build neutral vocabulary against Prussian anti-sodomy law. Krafft-Ebing and Moll reintroduced the pair around 1890, the noun "heterosexuality" is recorded around 1900, and the words only entered common English in the 1960s.

History

The word "heterosexual" was coined by the Hungarian-Austrian writer Karl Maria Kertbeny (born Karl-Maria Benkert), first used privately in a letter to the jurist Karl Heinrich Ulrichs dated May 6, 1868, alongside three companion terms ("monosexual," "homosexual," and "heterogenit") as part of an attempt to build a neutral, non-legal vocabulary for sexual variance in place of the criminal terminology then used to prosecute sodomy. Kertbeny defined "heterosexual" by numerical majority rather than by reproductive function, a deliberate move meant to normalize same-sex attraction by classifying it alongside opposite-sex attraction as simply a different pattern of instinct (OutHistory: Jonathan Ned Katz, "Constructing the Heterosexual, Homosexual, Bisexual System"). Kertbeny publicized both terms the following year in anonymous pamphlets opposing Prussian anti-sodomy statutes, but they found little traction until psychiatrists Richard von Krafft-Ebing and Albert Moll reintroduced them into clinical literature around 1890; the abstract noun "heterosexuality" is first recorded around 1900, and the terms only entered common English usage by the 1960s (Wikipedia). The irony historians have noted is that Kertbeny coined the pairing in the service of decriminalizing homosexuality, yet the clinical establishment that popularized his terms went on to use "heterosexual" to mark different-sex attraction as the medically normative standard against which homosexuality was pathologized for most of the 20th century (OutHistory).

Demographics & research

Heterosexual identification is the large-majority pattern in general-population surveys. Gallup's 2024 U.S. survey found that 85.7% of adults identify as straight or heterosexual, with the remainder identifying as bisexual, gay, lesbian, transgender, or another LGBTQ+ identity (Gallup). Using a different methodology (the CDC's Behavioral Risk Factor Surveillance System rather than Gallup's own polling), the Williams Institute at UCLA estimated that 5.5% of U.S. adults identified as LGBT as of 2020–2021, or roughly 13.9 million people, implying that the large majority of the remaining adult population identifies as heterosexual (Williams Institute). Estimates vary somewhat by survey instrument and by how directly respondents are asked about orientation, but heterosexual identification consistently exceeds 85% of U.S. adults across major population surveys.

Terminology & related identities

Heteroromantic is the romantic-orientation counterpart, describing romantic (but not necessarily sexual) attraction to a different gender; it is used by people across the sexual-orientation spectrum, including some asexual people whose romantic and sexual orientations do not align (GLAAD). Heteroflexible describes a predominantly heterosexual orientation with occasional same-gender attraction or experience, distinguishing self-identified flexibility from bisexuality proper. "Straight" functions as the everyday, informal synonym for heterosexual, while "heterosexual" itself carries a more clinical register, reflecting its 19th-century coinage as sexological terminology rather than vernacular speech. Unlike orientations organized under the LGBTQ+ umbrella, heterosexuality is not typically framed as a chosen community identity requiring public disclosure, a point connected to its long history as the socially assumed default rather than a label people adopt to describe themselves to others.

Common misconceptions

A recurring misconception treats heterosexuality as simply the "normal," unmarked condition rather than one orientation among several, with homosexuality and bisexuality cast as deviations from it. Leading professional bodies reject this framing directly: the American Psychological Association states that heterosexual and homosexual behavior are both normal aspects of human sexuality, and classifies heterosexuality as one of several normal variants of sexual orientation rather than a baseline from which others diverge (APA). A related misconception holds that sexual orientation, including heterosexuality, is a deliberate choice; the APA states that most people experience little or no sense of choice about their sexual orientation, a description that applies to heterosexual identification as much as to any other orientation (APA). A third misconception treats orientation categories as rigid and mutually exclusive, such that any same-gender attraction or experience would disqualify someone from identifying as heterosexual; the APA instead describes orientation as ranging along a continuum from exclusive different-gender attraction to exclusive same-gender attraction, with most people falling somewhere between the extremes rather than at a fixed pole (APA).