In communities around the globe, genderqueer, gender-variant and gender-fluid people are rejecting the categories of male and female, and attempting to re-define gender identity. Linda Pressly asks if being non-binary breaks the last identity taboo, and explores the challenges it creates for the law, society and conventional concepts about the very nature of gender. Producer: Lucy Proctor (Photo: Pips Bunce, the global head of Fixed Income & Derivatives IT engineering at Credit Suisse, who identifies as gender-fluid, or gender-variant).