Time was, schoolboys in England couldn’t wait to get out of short trousers and into long ones, even their older brothers’ cast-offs. They would have done so much sooner if their mothers had been less mindful of the cost involved. A wipe of Savlon on a cut knee is a lot cheaper than having to buy a new pair of bags gone through at the knee as the result of playground football.
Any boy caught wearing a skirt at our school would have found his head coming into contact with the facilities. As for hot weather, it was hot all the time.