How does love begin? How can a man say he loves his wife, yet still cheat on her? Why do we stay in relationships even after the romance fades? How is it possible to fall in love with the "wrong" person? Physical attraction, jealousy, infidelity, mother/infant bonding--all the behaviors that so often leave us befuddled--are now being demystified by today's social neuroscience. Larry Young, one of the world's leading experts in the field, and journalist Brian Alexander explain how those findings apply to you and boldly attempt to create a "grand unified theory" of love.