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That’s a stretch, in my opinion, but I could well be wrong. Personally it didn’t bother me one bit, it was just a heavy pat on the back....but it takes very little for a band of monkeys to undergo a phase shift from play fighting to brutal beatings.
I suppose it can be one of the ways that the group maintains boundaries, part of the communication of group - bringing outsiders closer to the centre - but the determinative factor is the individual’s framing of the ritual, not the performance of the ritual by itself.
