The sex atlas

The best way to describe this book is that it is a college textbook which contains detailed descriptions and explicit photographs of just about every aspect of sex, from anatomy and physiology, to the psychology of sex -- and everything in between. This book is intended for mature audiences, specifically for professional and college students who need to learn human sexuality as part of a comprehensive curriculum, such as medicine, social work, psychology, and specialty in various types of issues of sex.

As mentioned, the photos are explicit as are various diagrams. The ages of the subjects in the photos will range from infancy to adulthood and even geriatrics. This book is a matter of fact and to the point.