I think that you shouldn't expect us
to know everything or pay attention
all the time especially if you are going
to ramble about an irrelevent subject.
We should also have lessons of life
to help us pratically in the future.
Learning about John Doe buying tons
of watermelons is not realsitic nor is it
neccessary for real-life application.
If you are desiring good classroom behavior,
you will not benefit by being passive.
It would be nice if you were assertive
that way we actually cooperate.
Teach the material in such a way
that we are interested
and will retain the knowledge
of the lessons for your tests