Heteronormativity is the concept that heterosexuality—romantic and/or sexual attraction between people of the “opposite” gender—is the normative or acceptable sexual orientation in a society. Heteronormativity assumes the gender binary, and therefore involves a belief in the alignment between sexuality, gender identity, gender roles, and biological sex. As a dominant social norm, heteronormativity results in discrimination and oppression against those who do not identify as heterosexual.