Before you jump and say the word "sex" is a word not allowed for PG-13 people, let me just say its a perfectly natural word used to describe a biological difference between two types of people in the biological sense, not just the act of doing the thing.
What is the difference between sex and gender?
Sex = male and female
Gender = masculine and feminine
So in essence:
Sex refers to biological differences; chromosomes, hormonal profiles, internal and external sex organs.
Gender describes the characteristics that a society or culture delineates as masculine or feminine.
We have been wrong all along in the champion bios, we should add the "Sex" tab cause that will properly convey what a person is biologically, and their gender is what the person is socially. Champions like Fiddlesticks, Blitz, Orianna and such have no sex, but are gendered as ether masculine or feminine. Same with biologically genderless champions of the Shadow Isles and many more.