I, intuitively, thought that creation of Air conditioning (especially in the car) has something to do with it. In so many of the old movies you see. A doorman

I, intuitively, thought that creation of Air conditioning (especially in the car) has something to do with it. In so many of the old movies you see. A doorman collects a gents overcoat and a hat as he enters a hall full of other people. And of course the, gent has arrived in a carriage or some other means of public transport. So when people didn't feel that much cold in a car. They also did not need an overcoat and a hat perhaps?