Setting the Youngsters Straight

Every year, it seems that I have one annoying class . . . it's usually a large class in the middle of the day, just before lunch, when the kids are fully awake, but also have low blood sugar -- and every year, when I am expressing my annoyance to this annoying class, one of the students kindly asks me if I am having a bad day . . . because these students aren't annoying individually, they are annoying as a horde of thirty boxed-in teenagers . . . and so they can't believe that they would ever be annoying; and every year, I have to explain to this annoying class that if I am in a bad mood, and expressing this to them, it is not from some outside influence -- because I am a consummate professional -- and the reason I am in a bad mood is a direct result of their annoying behavior. . . and this always shocks them a bit, and makes them laugh: I think it is human nature to think that if someone is in a bad mood, it's certainly not my fault, there must be some other reason, some reason outside of me, because why would anyone ever be angry at me?