Many of the texts i'm reading these days are talking about the move from childhood to adulthood and the liminal/transitional stage in-between. Although the concept of "teenager" is relatively new (created during the American depression to keep younger people out of the workforce), most societies have a transition period between childhood and adulthood. Of course, girls' transition has been historically marked by menstruation while boys tend to go through some ritual of moving into adulthood. In almost all these texts, adulthood is seen as a desirable state to be in, full of all sorts of privileges. It is assumed that children want to move into adulthood and that part of the liminal stage is about taking on adult privileges (sex, drinking, ...) while still having childhood responsibilities (a.k.a. few). In most societies, the key to the transitional phase is the removal from the core community to a separate one and then a return...
Contemporary American society has really stretched the liminal stage to include mandatory high school and socially required college. Rather than moving into adulthood at menstruation/male strength periods, we have another 10 years to wait before we are deemed adults. We don't even leave home until 18 even though menstruation has dropped to 12 and below. With the liminal stage stretched out, there's a drastic increase in participating in adult behaviors with childhood responsibilities.