One of the things I know people back in the day used to do that not many people do more is to sleep with their windows open. Whether or not you should sleep with your windows open I think really depends upon two factors, one being where you live and what is the crime rate in the area, and depending how comfortable you feel sleeping with windows open. If I lived in a really busy City that had a large population of people that I probably wouldn’t sleep with the window open, just because even though I know that my neighbors around here were always good people and we’re very friendly, you never know when the wrong kind of person might snoop around. However, since I have moved down to a more rural area there really aren’t any close neighbors around me, and I feel pretty comfortable sleeping with the windows open and fairly confident in my ability to protect myself so I’ve been sleeping with my windows open. I love the cool breeze that brings in. I used to use a window air conditioning system if I wanted to cool down in the middle of the night but I find that I like having a window open more than I like using a window AC unit. Bringing in that natural fresh air or something I will never forget, and will continue to do probably until the day I die. A window AC system cannot compete with it.