These days our society is moving further and further from the simple conception of gender as a binary: male or female, man or woman. We are beginning to recognize that gender is complex. In the natural world, scientists continue to discover undeniable examples of how sexuality is multifaceted and fluid, from the parthenogenesis of blacktip sharks to the three distinct sexes of the midshipman toadfish. But we're not there yet. Binaries have kept us trapped for a long time, defining us by what we are not or what we supposedly cannot do, rather than by who we are and what we're really capable of.
Alison Leigh Lilly 