"The way we are all taught, from a young age, to make the link between visible biological sex traits and behaviour can be extremely powerful in shaping our intuitions about other people. This process of interpretation and the way it affects how we relate to and behave towards others is part of the system we call gender. Feminism, though, ought always to interrogate biological essentialism (the idea that a person’s nature or personality is innate; arising from, or connected to, their biological traits). The idea that anyone born with a penis is inherently more aggressive or violent because they have a penis is an anti-feminist idea: it actually suggests that male violence is linked to biological ‘essence’ and is therefore inevitable, immutable, perhaps not even truly men’s fault. Yet anti-trans feminism is forced to rely on biological essentialism in its insistence that there is too great a similarity between trans women and cis men for the former to be regarded legally and politically as women. Transphobic feminism often uses imagery connected to penises (imagined or real) belonging to trans women as a powerful rhetorical tool, to suggest that trans women are exhibiting aggression or entitlement or are a threat."