The actual cartoons were on the office door of a Professor of Medieval History under whom I worked over twenty years ago, and I remember laughing aloud - being almost helpless with laughter - when I first saw them there.
The Professor was one of the best bosses I have ever worked for anywhere, anytime, a civilised, urbane, scholarly, gentle man with a subtle and dry sense of humour who treated his staff with courtesy, and respect allowing them complete scholarly and intellectual autonomy while gently encouraging their academic pursuits and careers.
It was said of him that he was 'a conservative' (and it was fairly well known that my views were somewhat different). This meant that some of my left wing friends expressed startled surprise that he had recruited me, and - for that matter - that I had accepted an offer to work under him. However, he was exemplary as a boss, multi-lingual, open-minded, incredibly well educated and taught me the very valuable lesson that what also matters in the workplace is how you treat people rather than forming opinions based solely on what people think might be your political or religious views.
Anyway, he liked both Doonesbury and The Far Side, and I admired him as a scholar, and respected and liked him hugely as a man.