But the concept of a "teenager" is a fairly new one. In the years before the Boomers, there really wasn't a lot of time for most young people between the ages of 12 and 18 to listen to pop music, call their friends on the phone, or obsess over boys and clothes (those two are mainly girl things!). The teens of the GI generation were dealing with the Depression and in earlier generations most teens were already working or getting married.
Then along came the 1950s and this HUGE group of kids were being born. Times were prosperous! GIs wanted their kids to have an easier life - a life of carefree ease. TV became accessible, rock n' roll happened and the whole world changed.
Suddenly anything "old" seemed out of place. The culture of youth was beginning.
I love using (vintage) teens in my work, too - they lend an air of fun to any piece! :D