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>> This is a deranged and nonsensical response. We all knew what boys and girls where until yesterday. Leave the kids alone.

> Something like 200 or less years ago boys were called girls until they went through puberty (or close to puberty) - speaking of puritanical England that is. Not sure about the rest of the world/continents.

The way you state that invites an anachronistic misunderstanding: it appears back then "girl" was a gender-neutral term for child:

https://www.historyextra.com/period/great-misconception/

> Nor have boys always even been called boys. Until the late 15th century the word ‘girl’ simply means a child of either sex. Boys, where they had to be differentiated, were referred to as ‘knave girls’ and girls in the female sense were called ‘gay girls’. Equally a boy could be a ‘knave child’ and a girl a ‘maiden child’.