"Maturity", "adult", "childish", etc. are all nonsense terms with no meaning, there is neither logic nor rationality behind them, they are shaming word cudgels used to coerce and browbeat and nothing more. Such groundless terms are applied entirely arbitrarily based on ephemeral concepts like "cool" or "normal" by these lobotomized tribal monkeys incapable of reason or proaction, making one wonder if they even possess a pre-frontal cortex at all.