In a heteronormative society, people need to display heterosexual attitudes and behaviour in order to comply with the norm for human sexuality. All people are assumed to have heterosexual preferences by default and all other sexual orientations are considered deviant. Central to the hetero-norm is what is sometimes called the heterosexual matrix. The matrix is a theoretical framework that explains the foundation of the hetero-norm; i.e. the notion that there are only two genders, woman and man, these two are made each other´s opposites and are expected to desire each other.