The study of sexual activities and of generation was the basis of ancient Hindu theology. Siva had on his left arm a ring on which was portrayed the sex organs in the act of procreation. The Greek bacchanalia, and the Roman saturnalian mysteries, the free love that prevailed during the festivities in honor of Mylitta, Anaitis, and Aphrodita were still relics of sex-worship. Herodotos’ statement that in Babylon women offered themselves, once at least in their lives, in the Temple of Venus, and that only after so doing were they considered free to marry, and his further report that the women on the vessels sailing for Bubastis to the festivals of Iris uncovered themselves in the presence of the men, show that sex-worship was not unknown among Assyrians and Egyptians. In the historic time sex worship was almost replaced by other forms of religion. Yet there are traces of the cult of the phallus to be found everywhere in ancient profane and sacred history. The temple in which the emperor Elgabal was brought up was represented on a bronze coin of his reign; an ionic peristyle with a peek into the Cella, but instead of the statue of a god was a gigantic phallus. Even the Hebrews worshipped in the phallus the principle of the production of life before the adoption of the cult of Jehovah. Records of phallicism can still be found in the Old Testament. Instead of invoking the Deity in taking a solemn oath, Abraham orders his servant to place his hand upon his phallus, because the phallus was still kept in its former high veneration. The slain enemy was, for this reason, deprived of his phallus. David bought Saul’s daughter with a trophy of two hundred phalli, taken from the slain Philistines. Circumcision also shows the incorporation of phallic ritual with religion. In the same light and with the same veneration as the phallus was the yoni worshipped. In the yoni was worshipped the receptacle of life, the divine ark, within the hidden enclosure of which was contained the mystery of life. Its interior was considered the holy of holies. The yoni was for that reason often represented by an ark, which was the holiest of all symbols in the worship of the Ancients. The worship of Osiris took place before an ark; the sanctum sanctorum of Jehovah’s temple harbored an ark. Yonism was the adoration of the vulva, as the organ through which the sexual powers are manifested. It is through the woman that the divine sexual emotions are aroused; it is the sight or thought of her that calls into activity the man’s generative nature and powers. The female principle in nature was hence not considered simply as a passive medium, but was exalted and worshipped as a potent factor in the mystery of creation and reproduction. The earth itself was considered feminine, and all natural orifices have been regarded as typical of that part which characterizes woman. The vulva, therefore, was the sacred symbol of the female principle in nature.