Why are we here? This is a commonly asked question that has perplexed man for ages. When this same question was posed to the author of this book by his 6 year-old niece, the gravity of the question became intense and the urgency to find the answer was greatly felt. This book is an attempt by the author to respond to the child's question from a psycho-physiological point of view by examining the idea that love is the reason we live. The narrative highlights the existence of physiological dictates, which conceivably consists of the neuro-hormonal mechanisms and the idea, spirit, concept and goals existing behind these mechanisms, that scientifically give credence to the idea that the experience of love is a physiological mandate for human existence.