Where there is love there is life. But what love is? To understand love at the deepest level, we need to know what love is and how it is explained? This book attempts to share inspiring insights, anecdotal experiences and perhaps incomplete yet valuable materials and viewpoints of general and notable people across the global cultures over time, which is presented precisely, easy to read, and understand to the readers on the matter of love, marriage and sexual behavior towards fulfilling the life's most intrinsic desire and happiness. The book is for the general public of all sections of global society and culture. The three key messages readers shall take away from this book. They are: a) love is the essence, b) marriage is a bond, and c) sex is the ultimate supreme pleasure of life. Explaining these themes, attempts have been made to broadly discuss about the topics, bringing together various ideas from diverse sources, historical periods, cultures, and philosophical perspectives, along with contemporary empirical work from psychology, sociology, anthropology, and neuroscience. The readers not only will enjoy the many flavors of the substance of the book but also get the facts and analysis of why we approach love, marriage, relationships, and observed or unobserved differences between men and women, and what social, historical, cultural, political, evolutionary, or biological factors might influence them. Nonetheless, the substance of the book tells the inner most words of every men and women that are being preserved since their young age. Finally, the book will be of good values and understanding with readers' own journey of love, marriage, and relationship. These are the reasons why the readers will buy the book. The main objective of the book is to let the readers rethink about the changing pattern of love and relationships over time.