If you touch-type on a computer keyboard, play a piano, guitar, or drums and perform a variety of tasks that require cooperation of both hands (like making a snowball), you are using motor skills in both of your hands. Even if you depend heavily upon your dominant hand, you can teach your alternate hand new tricks. Although many people do shave entirely with their dominant hand, if you can learn to use both hands you will find it is easier to shave certain parts of your face.