You may already know, Reader, that Dr. Fritz’s office has a back door. That glass door leads directly from the office to a field of grass, and almost 20 years ago, it was one of the deciding factors in Dr. Fritz’s decision to lease this particular office space. When the architect was called to build the space out, that back door received a lot of attention…frankly, most of the way the office works hinges (a pun!) on the back door. It lets the light in. It lets the doctor out. 
In good weather, you will probably find the back door propped open and Dr. Fritz sitting (or lying) in the grass in the sun. That’s where she often dictates her patient notes. It’s where she reads patient charts and where she rests. It’s where she daydreams. It’s one reason her patients see her as so relaxed and happy (and tan).
I guess everyone needs a back door.