I made reference to this cartoon a day or two ago, and one of my readers thought I ought to have posted the cartoon itself, so people would know what I'm talking about.
Excellent idea, but until he mailed it to me, I hadn't seen it in years. In appeared in 1993 or so, in The New Yorker.
By way of thanking TNY for this cartoon, which has been referenced by so many people over so many years, I should point out that you can get their wonderful cartoons and magazine covers on a variety of media, such as coffee cups, t-shirts, note cards and the like, at The New Yorker Store. It's a wonderful site to browse, and it's hard to resist buying all sorts of things you don't really need, because you want to share them with your friends and relatives.