Funny Dirty Joke

Pupil: A pupil in class was banging her calculater on the table because it wasnt working.
Teacher: Erm what are you doing!?
Pupil: My calculater isnt woking.
Teacher: Well you dont have to bang it on the table i mean im sure you wouldnt like it if i banged you on the table!
Whole Class: [Laughing out loud] LOL
Do you get it ??????????