As soon as I read that unintended prompt I expected a solid reply like this and was not disappointed. To this I should add that before pants became the norm, skirts were not only the masculine wear for centuries, if not milennia, and pants were considered effeminate by the Romans. And further:
Both male and female children were called "girls" until about
100 years ago. Gendered clothing for children is only slightly younger than that -- iirc, the baby pictures of FDR had him dressed in "girls" dresses as a four-year-old. The blue and pink gender colors were switched on the same timeframe.
Gendered toy aisles hit in the
seventies but rightwingers raise hell when they're eliminated while claiming tradition -- a tradition created by marketers meant to exploit child and parent insecurities while being younger than the James Bond franchise.
We are absolutely making this shit up as we go along and memory-holing the rest, kids.