Gender is external constructs, a system of subordination which keeps women down with abuse, and women emancipated themselves from it/ If you demonstrate male pattern abusive behaviour you are demonstrating your gender... Rape is expressing your gender, sexual abuse is expressing your gender, domestic abuse is expressing your gender.
This is such an important point, Lisa. So many people, even many feminists, seem to think 'expressing gender' is primarily about clothing and other external markers.
Hence David Bowie was regularly described as 'gender non-conforming' simply because he sometimes dressed in feminine clothing and wore make-up. Whereas a truly gender non-conforming man is one who consciously seeks to unlearn patterns of dominance and entitlement towards women and children.
And this lazy assumption carries over into trans politics, whereby most people assume that male people who identify as trans are rejecting masculinity and taking on femininity simply because they adopt feminine appearance norms. Whereas within femininity there is a whole host of sex roles that have nothing to do with appearance, such as doing the bulk of the care work, the housework, and subordinating one's own needs to others', which most men who adopt a 'woman identity' don't seem interested in at all.
In the same vein, putting on lipstick and demanding to be called 'she' doesn't mean that a man has rejected male-dominant behaviours, as the behaviour of many trans activists shows. (And I'd argue the latter behaviour is male dominance in action.) At base, gender is not about eyeliner and pronouns. Gender is about male entitlement to women's bodies, labour and lives.