One thing that's fun about the internet is... okay, sure, porn, but you don't need me to tell you about that. Bur for people like myself who have an interest in odd or out of fashion animation, you can find samples of just about anything online.
This one is a collaboration between cartoonist/novelist/playwright Jules Feiffer and animator Gene Deitch--the latter father of underground comics genius Kim Deitch. I was surprised to find out from the Wikipedia page that it was made before American escalation in Vietnam. Still, the habit war has of picking out the young and naive is a pretty clear aspect of the film.
Mom and Dad really didn't do anything about that, did they?