People seem to have become increasingly more concerned in the 20th century about privacy and their personal information. It's also been the time when people in many countries have had the opportunity for personal space and private rooms.
Before people had their own designated private space, did people still have the desire for privacy? I've heard that people were at ease having sex in front of others. Was there a different idea about what it meant? How did people feel about sharing personal thoughts and feelings and having those shared amongst the community?
I'm looking for answers about the social history, though if laws back it up I'm interested in that too. I'd also be interested to hear about relevant books and papers.