I still think this guy comes up with some decent theories

"Hieros Gamos is Greek," he continued. "It means sacred marriage."

"The ritual I saw was no marriage."

"Marriage as in union, Sophie."

"You mean as in sex."

"No."

"No?" she said, her olive eyes testing him.

Langdon backpedaled. "Well... yes, in a manner of speaking, but not as we understand it today." He explained that although what she saw probably looked like a sex ritual, Hieros Gamos had nothing to do with eroticism. It was a spiritual act. Historically, intercourse was the act through which male and female experienced God. The ancients believed that the male was spiritually incomplete until he had carnal knowledge of the sacred feminine. Physical union with the female remained the sole means through which man could become spiritually complete and ultimately achieve gnosis--knowledge of the divine. Since the days of Isis, sex rites had been considered man's only bridge from earth to heaven. "By communing with woman," Langdon said, "man could achieve a climactic instant when his mind went totally blank and he could see God."

Sophie looked skeptical. "Orgasm as prayer?"

Langdon gave a noncommittal shrug, although Sophie was essentially correct. Physiologically speaking, the male climax was accompanied by a split second entirely devoid of thought. A brief mental vacuum. A moment of clarity during which God could be glimpsed. Meditation gurus achieved similar states of thoughtlessness without sex and often described Nirvana as a never-ending spiritual orgasm.

"Sophie," Langdon said quietly, "it's important to remember that the ancients' view of sex was entirely opposite from ours today. Sex begot new life--the ultimate miracle--and miracles could be performed only by a god. The ability of the woman to produce life from her womb made her sacred. A god. Intercourse was the revered union of the two halves of the human spirit--male and female--through which the male could find spiritual wholeness and communion with God. What you saw was not about sex, it was about spirituality. The Hieros Gamos ritual is not a perversion. It's a deeply sacrosanct ceremony."

His words seemed to strike a nerve. Sophie had been remarkably poised all evening, but now, for the first time, Langdon saw the aura of composure beginning to crack. Tears materialized in her eyes again, and she dabbed them away with her sleeve.

He gave her a moment. Admittedly, the concept of sex as a pathway to God was mind-boggling at first. Langdon's Jewish students always looked flabbergasted when he first told them that the early Jewish tradition involved ritualistic sex. In the Temple, no less. Early Jews believed that the Holy of Holies in Solomon's Temple housed not only God but also His powerful female equal, Shekinah. Men seeking spiritual wholeness came to the Temple to visit priestesses--or hierodules--with whom they made love and experienced the divine through physical union. The Jewish tetragrammaton YHWH--the sacred name of God--in fact derived from Jehovah, an androgynous physical union between the masculine Jah and the pre-Hebraic name for Eve, Havah.

"For the early Church," Langdon explained in a soft voice, "mankind's use of sex to commune directly with God posed a serious threat to the Catholic power base. It left the Church out of the loop, undermining their self-proclaimed status as the sole conduit to God. For obvious reasons, they worked hard to demonize sex and recast it as a disgusting and sinful act. Other major religions did the same."

The DaVinci Code, chapter 74