Constructions of sexuality in South Africa often stem from biological and essentialist understandings of sex and gender. In your essay, explain the concept of 'heteronormativity' and how it constrains not only the experiences and identities of people with non-normative sexual and/or gender identities but also cisgender and heterosexual South African people. Be sure to critically engage with this concept, and use relevant literature to support your arguments. Intext references please