Erasing the biological definition of sex

*Trying to erase the biological definition of sex isn't just misguided — it's dangerous.*

Socially (or individually) defined gender rules are central for some purposes ‐ mainly those relating to social relationships (including but not limited to sexual or romantic relationships). Biological sex is crucial for some purposes — mainly those relating to reproduction, medicine and biology. We need to recognize both and distinguish them, in our thinking and in our language.