What really links this to the teacher from the wall are the lines:
Sweetheart, sweetheart, are you fast asleep? Good
Cos that's the only time that I can really speak to you
referring to "The Happiest Days Of Our Lives" where the last lines let us know that the teacher's wife is psychopatic and not at all sympathetic, so the traumatized teacher can only speak to her when she's asleep, otherwise she would just thrash him within inches of his life.
What really links this to the teacher from the wall are the lines:
Sweetheart, sweetheart, are you fast asleep? Good Cos that's the only time that I can really speak to you
referring to "The Happiest Days Of Our Lives" where the last lines let us know that the teacher's wife is psychopatic and not at all sympathetic, so the traumatized teacher can only speak to her when she's asleep, otherwise she would just thrash him within inches of his life.