This is today's quote from refdesk.com:
"In the United States, it is now possible for a person eighteen years of age, female as well as male, to graduate from high school, college, or university without ever having cared for, or even held, a baby; without ever having comforted or assisted another human being who really needed help. . . . No society can long sustain itself unless its members have learned the sensitivities, motivations, and skills involved in assisting and caring for other human beings." - Urie Bronfenbrenner
It strikes me that this could be true anywhere; how about where you are?
(Of course, there are more than enough teens who probably have multiple children, but that's another post.)