For the men of fluther, were you reckless when you were young and how old were you when you 'grew up'?

My son is 18 and I am at a loss about some of his actions and choices. I have read research that suggests male brains develop slower than female brains and that boys are programmed to behave recklessly in their youth. Men of fluther, was this true of you and when did you grow up and start to behave responsibly? Was there anything that helped prompt this development or is it just a case of weathering the storm and hoping he grows up sooner rather than later and doesn’t cause himself or others harm along the way?