Burgers, Ferraris and Porn

What do all successful fast-food restaurants have in common? Why do men's testosterone levels rise when they drive a Ferrari or a Porsche? Why are women more likely to become compulsive shoppers and men more likely to become addicted to pornography?

These are just some of the questions Dr Gad Saad set out to answer in his book, "The Consuming Instinct: What Juicy Burgers, Ferraris, Pornography, and Gift Giving Reveal About Human Nature ".

Dr. Saad is a professor at the John Molson School of Business at Concordia University in Montreal. He deconstructs his theory with Geeta.