You can think people can't change sex. You can say people can't change sex. But in the workplace you show respect to others.
It's not just thinking it or saying it, it is scientific fact that you cannot change sex. You can have surgeries that will approximate external sex characteristics of the opposite sex, and take opposite sex hormones but not one cell in your body is changed. No mammal has the ability to change sex, we're not clownfish. Showing respect shouldn't mean I have to pretend that someone has changed their sex, and accommodate them in what were single sex spaces. I will use the preferred name but may avoid third person pronouns as far as possible. Gender always used to be a "polite" way of indicating sex. Against the category "gender" there'd be options to tick M for male, F for female. Hundreds of genders is a nonsense, they're personalities not genders. There are about 4 billion males in the world, about 4 billion females and 8 billion different personalities.
What colour car do you have or did you used to drive?
Voting. I’m so glad we still have the ‘old fashioned’ system…


