The second edition corrects a technical error and further expands our concept of love. This narrative text is an encyclopedic and expansive, comprehensive and integrated overview of sexual biology and erotic love beginning at the genetic level. It is written as one guy talking to another. It was an amazing sexual experience that led Noble to the writing of this book. He is still cursed with curiosity after 15 years of research, because we still know very little mainly because of our perspective and building on misinformed precedent. The historic clues indicate a much different life among...