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As I understand it, cultures that were poor enough that animals and people all lived together (and in cold climates, shared heat) in https://en.wikipedia.org/wiki/Longhouse structures had almost no privacy (hence the popularity of "rolls in the hay" in english or "going for a walk" in russian?) and the people who build later structures seem to have nearly universally preferred individual rooms, with open-dormitory-style arrangements reserved for those who had little choice: military, hospitals, etc.