Doonesbury by Garry Trudeau for November 29, 1980
Transcript:
Honey: It sure is going to be good to get home. I hope I recognize the place. From what I hear there's been quite a transformation in social mores. There's even a new Little Red Book on sexual matters. J.J: No kidding? A Chinese sex manual? Honey: That's right. And it's said to have actual diagrams depicting the reproduction of single cell organisms? J.J: No! Honey: Apparently, they're quite explicit.