In my opinion, maturity is in the eye of the beholder. My opinion on what a mature act is may differ from the next person and that continues through person to person. Some people are mature from the day they're born, thet don't have a childish bone in their body, some -as we all know-, are quite different.
Some people tend to mature very quickly and suddenly, possible through a life lesson learned or through the natural way of growing older. Maturity isn't something you learn but something you experiance, and I feel many things can sway your judgement and hense, affecting the depth of your maturity in a paticular act.
Immaturity has a lot of grey areas, you can't really define it for each age or each person. Who's to judge what is mature and what isn't? You've just got to be yourself, your natural self, and if that means being immature so be it, that's who you are and at the end of the day, you're not expected to be anything else.
