Heteronormativity is a term used by social theorists in order to discuss the way in which gender and sexuality are separated into hierarchically organised categories. It has become one of the most important ways of thinking about sexuality within the academic study of sexuality. Theorists have argued that a discourse or technique of heteronormativity has been set up, and subsequently dominates, social institutions such as the family, the state and education.
Heteronormative discursive practices or techniques are multiple and organise categories of identity into hierarchical binaries. This means that man has been set up as the opposite (and superior) of woman, and heterosexual as the opposite (and superior) of homosexual. It is through heteronormative discursive practices that lesbian and gay lives are marginalised socially and politically and, as a result, can be invisible within social spaces such as schools.
Theorists have become interested more recently with bisexual, transgender and intersex lives. If one is able to exist between gender and sexual categories of identity, then one provides a counter argument to the idea that gender and sexuality are fixed and/or natural human characteristics and provide a way to challenge or ‘queer’ our understandings of these categories. Bisexual and transgender identities are able to be read in this way because law, science and education often talk about gender and sexuality as fixed, immovable and pre-ordained human characteristics that fit into either oppositional group (male/female and gay/straight). Political rhetoric also often follows this script. The idea that people can live in a different gender to the one they were born into, or refuse to identify as either male or female, or that people can have intimate sexual relationships with men and women and reject the gay or straight classification, demands that we re-think the way we understand gender and sexuality, what they mean and what they are and can be.