If a person's biological sex is whatever they say it is, why does it take a female and a male to reproduce?

I'm talking about sex here, not "gender." If a female can be male just by saying so, and vice versa, what would we call the half of the species that provides sperm? And what would we call the other half who carries the egg, if the scientific terms "male" and "female" are... show more I'm talking about sex here, not "gender."

If a female can be male just by saying so, and vice versa, what would we call the half of the species that provides sperm?

And what would we call the other half who carries the egg, if the scientific terms "male" and "female" are misnomers/constructs?

Do people who believe this think we should teach in schools that a female and a female can reproduce?
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