Dr. Richard Lewinsohn has taken the subject of sex and, instead of leering, jeering or crudely joking about the subject, he take a scholarly approach that is informative and tries to explain how humans cope with sex; how sexual mores have changed from historic times to the present; sexual diseases and sexual differences. This is information and it should be read as such. It de-mystifies many myths and corrects misconception, fallacies and ignorance.