I was seated at the teacher's desk. It was nice to sit, as I had been standing all day. A student came up to the desk in search of something or other, and he talked to me.
Student: "It must be boring."
Student: "Are you here all day?"
Me: "Of course." (I was not sure what he was getting at. He knew his teacher was out all day.)
Student: "It must be tough."
Me: "What's tough?"
Student: "Dealing with these kids all day."