Cradling a telephone between the ear and shoulder stretches one side of the neck and compresses the other and is tough on the muscles in the neck and shoulders and tough on you. Muscles have memory and when you spend 2-8 hours locked into this position day after day, they will hold this uncomfortable position, keeping your shoulders scrunched up around your neck. Use a headset to avoid head tilt and remain comfortable, especially if you answer the phone often while performing other tasks.