In this tutorial, we learn how to draw lips and teeth. First, you will need to draw the sketch or outline of the picture. You will need to make sure you take your time to create realistic lines for the lips and the teeth as well. From here, you will add in more lines on the lips to make it look more realistic. Then, add in the teeth in the middle of the lips and shade in the areas that are in between them. When you are finished with this you can add in more shading and lines into this and you're finished!