Penis envy
What do a pair of preschooler's do in a bathroom do? Compare swords of course.
Galen and an accomplice to remain unnamed were visiting the bathroom. The teacher, after a few minutes of strange silence, decided that a rescue party should be deployed. And what did she find? A couple of kids discovering that, yes, other boys have a penis too. And what fun it is to shake them in the wind.
I hope that neither one was left feeling inadequate. And I wonder of the joy of shaking one's sword free in the wind.