THE happiness of all human beings, men and women, depends largely on their rational solution of the sexual problem. Sex and the part it plays in human life cannot be ignored. In the case of animals sex plays a simpler and less complex r&ocirc;le. It is a purely natural and instinctive function whose underlying purpose is the perpetuation of the species. It is not complicated by the many incidental phenomena which result, in man&#39;s case, from psychologic, economic, moral and religious causes. Climate, social conditions, individual modes of life and work, alcohol, wealth and poverty, and other factors affect sexual activity in human beings.<br /><br />The average man, woman and child should know the essential sex facts in order to be able to deal with the sex problems of life. Of late years there has been a greater diffusion of such knowledge. To a large extent, however, children and adolescents are still taught to look on all that pertains to sex as something shameful and immodest, something not to be discussed. Sex is an &ldquo;Avoided Subject.&rdquo;