Saturday Morning Cartoons

Like Harris and Klebold, or maybe Muhammed and Malvo, the relationship of Spike and Chester is your average sociopathic symbiosis -- with one figure playing the dominant role and the other the submissive, brainwashed "son" whose only goal is to win the acceptance of his partner through promises of violence and revenge against the world that's ignored and/or forsaken both of them.

From 1952, here's Tree for Two.