Heterosexuality consists of sexual behavior, practices, and identity predicated on a primary preference or desire for the opposite sex. As a sexual orientation, heterosexuality refers to "an enduring pattern of or disposition to experience sexual, affectional, physical or romantic attractions primarily to persons of the opposite sex"; it also refers to "an individual’s sense of personal and social identity based on those attractions, behaviors expressing them, and membership in a community of others who share them".[1][2] The term is usually applied to human beings, but it is also observed in all mammals.
The physical action of heterosexual fertilization is the only means of sexual reproductive capability among humans without the use of assisted reproductive technology. The associations with romantic love and identitygender rolemedicine and later biology disciplines, and more recently that of psychology. Heterosexuality, bisexuality and homosexuality together make up the heterosexual-homosexual continuum.
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