Subconscious listening L6_2 - Why are you yawning?

A: Why are you yawning?
B: I'm sleepy.
A: Why don't you go to bed?
B: I want to watch this TV show.
A: Maybe you should record it.
B: The tape recorder is broken.
A: Then you should watch the re-run.
B: Why? I am watching the original
A: But you'll be asleep in about 1 minute.
B: I am just yawning because the commercials are on.
A: Ok, I'll show you how the show ends.