To hip those who may not have come across this, the word "orgy" comes from the Greek word "orgia", and it turns out it's not really about boning:

Orgia may have been earlier manifestations of cult than the formal mysteries, as suggested by the violently ecstatic rites described in myth as celebrated by Attis in honor of Cybele and reflected in the willing self-castration of her priests the Galli in the historical period. The orgia of both Dionysian worship and the cult of Cybele aim at breaking down barriers between the celebrants and the divinity through a state of mystic exaltation:

Violent secret rituals aimed at communing with "the gods"? Never saw that in any of my Pronhub searches for "orgy".