From about age 17 to 22 I managed to screw up more times than the the total for the other 47 years. Actually, probably about 3 or 4 times more than the total of the other.... I can't even count (possibly remember) the number of times I was almost, killed, maimed, sent to prison and such. I can count the number of times I was blown up, shot, and almost became a parent, as well as how long I did spend in jail.... "and I was the good son who was raised right." 21 for a minimum... either that or mandate testosterone reducing drugs for all teenage males