The hair is divided into three sections to allow for the ear:
Make the first section at the back of the ear. This allows you to pick up your guide line from the back of the haircut. Cut this section freehand.
The second section is combed over the ear. Use the wide teeth of your comb to create relaxed tension in the hair and to allow for the ear. Cut this section freehand.
The third section is in front of the ear. Cut this section freehand as well.