13. Trousers are not appropriate for young boys.

Reason: Among English people, it’s a “silent class marker.”
Exception: Oftentimes, when the weather is excessively cold,
You may have observed that Prince Louis almost always wears shorts rather than pants when he goes out. This is due to the fact that dressing young boys in shorts is a “very English thing,” according to Harper’s Bazaar.

Boys should not wear trousers too young, according to Pool/Getty Images.
It’s a “silent class marker,” reserved for the affluent (to whom the Royals undoubtedly belong). Louis is dressed in shorts because he is still a young child, which is a sign of his high rank and probably makes it easier for him to run around than long pants.