Well the truth is they don't turn it on due to the cost of running .. and there houses don't really cool off
A few years ago I updated the my heating/AC system and it was worth EVERY penny ..
They end up with a 400 electric bill and still a hot house and I end up having 150 electric bill and a cold house
This is one of the reasons way all the neighborhood kiddies are always over my house in the summer ..