Noun
heteronormativity (countable and uncountable, plural heteronormativities)
The assumption that all human beings are either male or female in both sex and gender, and that sexual and romantic attraction and activity only occurs, or is only normal, between people of different sexes.
Because oppositional sexism is tied to heteronormativity in this way, non-heterosexuals are seen as breaking gender norms. Source: Internet
Heteronormativity naturalizes heterosexuality so much that any other relationships are seen as mimicries of heterosexual ones. Source: Internet
Welker has also written that boys love titles liberate the female audience "not just from patriarchy, but from gender dualism and heteronormativity." Source: Internet