To prevent this? It's easy, and in just 3 steps:
- before the lipstick, apply a lip balm, it will create a smooth canvas for the pigment; help the lipstick pigment to stay in place;
- use a lip liner, always in the same color as the lipstick, as not only it creates definition but helps the lipstick to stay in place;
- apply your lipstick evenly through your lips, and gently insert your thumb straight out of your mouth: this will clean any pigment that was on your inner lips, the ones in constant contact with your teeth.
- Add some lipgloss, if you like.
And don't forget to smile ;)