A really large number of them are references - possibly dated references - to other things. Sometimes cultural phenomena (the movie Ishtar, which was before my time and I’m really old) but often scientific or other phenomena. In one of his books he mentioned a biology teacher who pinned a load of his comics to the wall and, week by week, the students would go “Ah, now I get that one” as they learned something about chimpanzee communication, eye spots, or whatever.
Of course, some are just whimsy. And others are warning us about those sneaky sneaky cows…
A really large number of them are references - possibly dated references - to other things. Sometimes cultural phenomena (the movie Ishtar, which was before my time and I’m really old) but often scientific or other phenomena. In one of his books he mentioned a biology teacher who pinned a load of his comics to the wall and, week by week, the students would go “Ah, now I get that one” as they learned something about chimpanzee communication, eye spots, or whatever.
Of course, some are just whimsy. And others are warning us about those sneaky sneaky cows…