For years, gender has been known to be a binary system. This gender binary refers to the idea that there are only two genders, male and female. Recently some people have come out as non-binary.
The non-binary movement seems to be gaining traction especially among young people in the West that social media platforms like Facebook and Tumblr have allowed its users to customise their genders among 72 options and many Schools, Universities and Public places have introduced gender neutral bathrooms.
Else, a documentary about gender variance showing three characters who identify under the umbrella term of Non-binary; a gender fluid person, a gender non-conformist and a Trans- woman.