well i think we all need both. if all u had in u were "just being mature" then that's boring. and for the kendo stick it's an interest of yours that have nothing to do with maturity. idk if u guys know what i am trying to say.
i meant doing something like a kid once in a while is cute. but my denfinition for "mature" is being responsible and have a brain of ur own. if u r childish u can still be mature at the same time.
(if u dont get it then just pretend i wrote nothing since i'm a bad explainer)