Zoe Cheong seeks to explain to the lay-quidditch person what it is like to be outside of the gender binary. In this article, they examine the common perception of biological sex as a binary, and how this breaks down upon closer examination. This is the first in a series of four articles by Zoe exploring sex, gender, identity, expression, and all of the complexities of being a minority in a minority sport, aiming to help more people understand non-binary perspectives and how more people how they can make themselves and the broader quidditch community more inclusive.