i guess when i went to college. After I could finally LEGALLY buy cigarettes, porn, and alcohol. Well not really. I could unfortunately not do ANY of those things when I first left home because I was only 17. Funny to finally be old enough to leave the nest but still have legal limitations on your life. i suppose in all reality it was probably not only after i first started booking trips, paying for hotels, leaving the country without "adult super vision", dealing with rent, bills, landlords, and the first time FUCK you actually have to pay the government income taxes..but also a few life experiences when i was in college...making you realize that you are touchable..."ur house can catch on fire". Telling your parents their worst nightmares. news no mother ever wants to hear. At that moment is probably precisely when it happened.