Disclaimer: I don't own FMA or any of the characters I'm about to use. That should be obvious by now.
Kimblee had a routine, so he always called the Führer at the same time everyday. At some point, he didn't even need to look at his surroundings to find his way, or at least not often.
This was a sort of solace for Miles, because this arrangement would only be more irritating if he was always giving directions.
However, every single day, Kimblee paused at the same broom closet, stared at it for a moment, turned to Miles almost subtly, and quickly started walking again.
Miles always felt he was missing something, and thought it might be better that way.