Initiation

From The Power of Myth Joseph Campbell tells of a New Guinea cannibalism ritual:

"There is a great shed of enormous logs supported by two uprights. A young woman comes in ornamental as a deity, and she is brought to lie down in this place beneath the great roof. The boys, six or so, with the drums going and chanting going, one after another, have their first experience of intercourse with the girl. And when the last boy is with her in full embrace, the supports are withdrawn, the logs drop, and the couple is killed. There is the union of male and female ... as they were in the beginning. ... There is the union of begetting and death. They are both the same thing.
Then the couple is pulled out and roasted and eaten that very evening. The ritual is the repetition of the original act of the killing of a god followed by the coming of food from the dead saviour."

Thanks Joerg (I think)