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Hahaha, ROFL, never heard of that one Sir..... :D

the point that I'm attempting to make is that we don't even know to any great degree, how OLD the 'rings' are...we have absolutely ZERO clue as to what they were used for.
Don't let anyone else tell you other wise.
Your guess (and it will BE a guess) is just as good as anyones.
(points for creativity...'religious rituals' are SO last century)