Gender role stereotypes help to perpetuate gender norms within the three subsystems of biology, society and culture. These stereotypes are perpetuated through various means, such as through pressure from society and institutions, and the creation (and internalisation) of cultural gender norms. They often become so ingrained that we do not realise the extent to which they are socially constructed, and as Harrison notes, “[t]he lack of conscious intentionality in a large part of our performance then supplies its ‘naturalness’” (2006: 49). Indeed, the fact that gender often involves the body naturalises gender performances.