What is the possible relationship between the two speakers?

W: Don’t you have any good news?
M: No. Yesterday, I had to stay after school, because I was talking during my biology teacher’s class.
W: You’d better keep quiet during class.
M: Sometimes I do. The day before yesterday, I was very quiet during my history teacher’s class and I still had to stay after class.
W: I don’t understand.
M: Because I fell asleep during his class. But it wasn’t my fault. The lesson was very dull.
W: I advise you to take school more seriously. If you don’t pass your exam, you’ll have to go out and work as a result.
M: I don’t see that it makes much difference. If I have a job, I have to do dull work every day, but if I’m in school, I must listen to dull teachers every day.