Underlined of mine.
According to someone, the possibility to take home nude or even homemade porn photography was one of the drivers of the Polaroid success.
You couldn't do that with pictures you had to bring to the shop and get them back. I bet they were Christmases...
There are a lot of "private" images on hard disks I bet all over the world (especially the more puritan countries).
I have the impression this thing is overlooked, undertalked, but it could just have been an enormous driver in the advent of digital. The fact that you don't have to show your pictures to your shopkeeper (and hence to the entire district) is just huge. It's not just nude or porn, is anything private in nature (like your child's poo to send to your brothers, mentioned in another thread, or children nudity, or whatever else).