This book is designed to be used by couples who are experiencing problems with their sexual relationship. It is written from the perspective of evolutionary-psychology. The book is in three parts. Part one is a fictional account of a group of pre-history humans. In it you will learn the story of a young girl and how the reproductive behavior of her tribe affects her life. In the second part you will be introduced to the ABCs of personality and how you can use this personality based approach in resolving sexual conflicts in your marriage. The third part is a series of questions, exercises and concepts that are spread throughout the book.