This book was fun. It looked like it might be. The author is a scientist who also enjoys a lot of “What if” sort of questions about a lot of human behaviors. This book is a combination of things he read about and researched, things he looked into personally and anecdata that he knows about things. He has a good sense of humor and his curiosity about, for example, what is really happening when we yawn or sneeze, made for very good reading. I was concerned this might be a dry academic text and it was not.