Much, much more exploitative sex was being had before the Sexual Revolution than after. This Arcadian vision of an idyllic time beforehand where people kept it in their pants was itself a deliberate illusion created by the societies involved to obscure the reality of the bordello
LARP is obviously a problem among Marxists (& the RCI has it in spades) but the idea you can have mass politics without ritual & a sense of tradition is ahistorical. If you get embarrassed by basic stuff like singing the International or calling people comrade you're ngmi imo