Did you know that at one time teenagers didn’t exist? The term teenager came into being sometime in the early 1940s. Before that, people were either children or adults. There was no in between stage. Friedrich Heer, a historian, writes about how things used to be: “Around 1800 young people of both sexes could reckon on being considered adults as soon as the outward signs of puberty made their appearance. Girls attained marriageable age at fifteen… Boys could join the Prussian army as officer cadets at the age of fifteen. Among the upper classes entry to university or to…