Doonesbury by Garry Trudeau for June 28, 1973
Man: So how'd your ol' man take it, kid? Zonker: Real hard, amigo. He thinks he's to blame. I mean, he really feels guilty! He kept mumbling that the President was right - that his generation has been too permissive with its children. I dunno... I guess he feels kinda bad because he gave me my first joint... Man: Yeah? Good stuff? Zonker: Out of this world!