So was talking about getting a pet and my son said what gender. I said not gender just boy or girl and he said we aren't 'allowed' to say that anymore we have to use gender. I explained that gender is something you can pick and there are lots people use including them/they which is fine for how someone identifies but not for animals or when talking biology. I am thinking he is confused because he said they use gender in biology now and don't use sex. I checked with a friend who said he is right.
AIBU? Surely sex should be used for a science subject like biology, and gender should be kept for personal use for how someone thinks they are.