“The old sent us to die and we hated them.” The new documentary Matt Wolf examines a most transient of identities. Teenage is comprised of archival footage of adolescent groups through the decades — flappers, punks, etc. — and anonymous narrations of once-teenagers. “We didn’t always exist.”  How did the youth (aged roughly 16-24) became labeled and recognized within a society that forces children behind factory machines and into the trenches of foreign countries? How did they avenge this oppression? What’s their fucking problem? Teenage opens March 14th on a limited release. Twitch has a positive review.