This book is a deep psychological and scientific analysis of human flaws, through the prism of which a number of basic mistakes made in the context of intimate life within a serious relationship will be revealed in detail. This clever trick allows you to uncover many mistakes, the avoidance of which will help you significantly improve the quality of intimacy within a love relationship. All ten flaws that I will rely on can be seen in the contents of the book. If you have any doubts about such an innovative approach on my part, I recommend that you first read my book The Competent Lover's Quest 3 in which I revealed the secret of success in intimate life through the prism of 10 moral values and basic human needs regarding intimate life, which you can also see for yourself in the contents of the free book. In this publication, I will approach my work just as responsibly, based on reliable facts, without beauty and esoteric excesses. Contains obscene language.