I found out my parents smoked pot when I was 17, and that same year they starting letting me smoke (although I don't think they knew my sister had already let me try it once), but I wish they'd let me in on it earlier. With my kids, it won't be a question of how many years has passed since the kid crawled out of a vagina but how mature the kid is psychologically. If I ever have children, I will allow them to smoke whenever I deem them mature enough to handle it. And I'm not going to hide it from them, ever, but I won't have to fear getting caught since by then I will have moved to the Netherlands.