Just The Facts : The age where we start making rational decisions

Teenagers get a lot of flack for being lazy and being irresponsible and such, but I think that's just part of growing up.  I can even remember when I was younger trying to keep everything straight between school and work and chasing girls, it was difficult to keep in all in order.  Turns out that our brains might be at fault, because there's a ceratin age where our brains mature to the point that we can make rational decisions.