Young boys in RPG games favor shorts.
I like shorts! They're comfy and easy to wear!When you're going on an adventure, you want light, easy-to-wear clothes. And little boys tend to favor shorts because, like the page quote says, they're comfy and easy to wear. Especially when it's warm out and pants are just too confining. This is meant to portray younger male characters as innocent and lighthearted, as opposed to the more "serious" adult characters in long pants or heavy armor. Boys in shorts is also Truth in Television as in the past, the mark of a boy reaching manhood was his first pair of long pants.