13: A guitar accepts that it's DESIGNED to have a bottom like that, and that making it smaller spoils the effect.

14: You can beat on the face of a guitar to provide rhythm accompaniment. Slapping your girlfriend's face in time to the music is not usually well-received.

15: When a guitar makes nasty noises at you, you can usually work out what you did wrong.

85 to go... :-)

Graham.