There are large signs on the regular doors that say "Please Use Revolving Door". This is because a revolving door does not let in heat or cold the same way a regular door does. When you open a regular door there is a large breeze of air that comes through, and it is very inefficient from a heating or cooling standpoint. A revolving door in contrast, is never really "open". At any point in time two if it's "arms" will be in contact with the walls, allowing it to maintain a "seal".
Well I think a very interesting study in human nature is these doors.
Fully 50% of the people I observe walk through the doors with the big signs on them saying "Please Use Revolving Door".
If I had the time I would sit there with a clicker and count actual numbers. But I am pretty sure that they ALL don't have a revolving door phobia. (If so I think we should start studying that because it would be more common than almost any other phobia that exists!).
Strange. Maybe it is not for me to understand.