What Are They Thinking?

I work with a teacher who is currently on maternity leave.  Due to circumstances we are on our sixth guest teacher.  One of the students takes advantage of this.  Every time we get a new guest teacher, he takes two lunches.  The first time I could understand.  He was new to the school and wasn't used to the two lunch system.  The second time I wasn't sympathetic and the students told me what was up.  Time number three was today.  Turns out his girlfriend has first lunch and he wants to be with her.  Humph.  God only knows whether he will try it again on Monday when I think we are getting a new long term guest teacher....