After an otherwise great keynote a couple years ago, the comment in the headline above was the only negative remark. It’s become something of an inside joke around here: Do all the research, analyses, insight, and graphic design for a great briefing, but never forget the whole thing can fall flat without the right staging on site, especially the food.

There’s a larger truth of behavioral economics in the “More bananas!” comment. In my latest Forbes column, I summarize a few of the more interesting experiments on how food, its temperature, or hunger have a strong effect on how we interact with people around us.