I had a friend who insisted "gender" should be used for linguistic use (for example cheese being masculine in French) and "sex" for the boy/girl-ness of a perso

I had a friend who insisted "gender" should be used for linguistic use (for example cheese being masculine in French) and "sex" for the boy/girl-ness of a person. Determining the boy/girl-ness of a chicken is called "sexing" the chick. I see "sex machine" as a machine that sexes by name.