Consider it, and dancing is a pretty strange action. Apart from being good exercise, it's not exactly functional, and yet -- dance is woven into society's fabric, all cultures having unique ways of expressing their identity through movement.
Children at play, especially in a moment of new discovery, can’t help but react with laughter, eyes widened in wonder. Joy can be mistaken for naïveté occasionally, misinterpreted as silliness or immaturity. Joyfulness isn't something we naturally grow out of. As Pablo Picasso said, "Every child is an artist. The problem is how to remain an artist once we grow up." It’s the same with joy; we need to cling to it with every fiber of our being, so when we meet the hardships, abuse, and heartbreak of the world, we don’t allow it to harden us.