Erasing to Self Discovery

Doing this exercise has been hard.  At first I sat there and argued that the assignment was impossible.  How can I use an eraser to draw myself without drawing first the edges?  Drawing just the axis of the head and the spacing  between the eyes and chin made this assignment difficult.

I started with the space between the lips and nose and worked to the cheek and then the neck.  When I got to the eye I started to use a pencil to define areas better.

Even though I look at myself in the mirror everyday, to look now and see the different shapes and lines and to draw them makes one become more aware of them self. I hope to get some time later this week so I can finish.