Your bridge is an important component on your stringed instrument. It is critically important to the sound, and playability. It is a beautiful thing when it is right and an obstacle when it is not. A warped bridge is not correct. Even a slight warp will cause intonation problems. The front of the bridge gives the impression of a lean toward the tailpiece. It is shaped this way to give it the correct thickness, weight and to add to the beauty of the instrument. The back of the bridge should be perpendicular to the top of the instrument.