Heteronormativity is the belief that heterosexual relationships are the default or "normal" way of being. This perspective often assumes that everyone is straight and that traditional gender roles should be followed. It can lead to the marginalization of LGBTQ+ individuals and relationships, making them seem less valid or acceptable in society. This concept influences various aspects of life, including media representation, laws, and social norms. For example, in many cultures, marriage is primarily viewed as a union between a man and a woman, reinforcing the idea that heterosexuality is the standard.