Lets see how step by step:
Create the outline with a lip pencil.In the same color as the lipstick or in more natural hues.
Continue with filling in the same pencil.
In that way you achieve a solid base and the lipstick will last longer.
Apply your lipstick.
Put your index finger inside your mouth. Open your mouth in an «O», shape, put in the index and pull it out slowly.
If you skip this step, the lipstick that has not spread well, will stick around your teeth. (Messing your finger is much better)
Make sure all went well and your teeth are clean!
GOOD LUCK !!!
Are you messing your teeth every time you put lipstick?