I realized I was a teacher when I felt warm during class and got up to open the door. Later on there was noise in the hallway, so I got up and shut it. Students can’t open and close the door whenever they feel like it

I realized I was a teacher when I felt warm during class and got up to open the door. Later on there was noise in the hallway, so I got up and shut it. Students can’t open and close the door whenever they feel like it (David Sedaris, Theft by Finding: Diaries 1977-2002)