The subject of sex is one of vital importance to every intelligent person. It is equally important to the ignorant individual although he may not be so well aware of the fact. Sex is intimately related to the best in painting and sculpture, is interwoven in the finest literature, if it is not its predominant feature, and is the motif in music whether it be the gallant's serenade or the opera Carmen. It is the controlling impulse or cause of man's best efforts in many departments of life, and also at the bottom of the basest and least desirable of human activities.