Privacy is why we have shades and blinds on our windows
Actually it's not.
You have shades and blinds on your windows due to
a) Ghouls, demons etc coming to haunt at the witching hour and
b) Biblical (protection of first born - blood on the outside wall by the door)
Joking aside blinds/shades was invented for 'privacy' but the history of covering windows in your dwelling is not based on privacy