Yes, it's true. Lips rub against each other, or with teeth, they will be deformed. Why do you think that dental plastic surgery will make your mouth bigger and your lips thicker? Why is biting your lips a particularly bad habit? I want to remind you, don't bite your lips, that is, sip your mouth. I'll talk nonsense a month later before it becomes a sausage mouth? In short, I don't need to explain the risk of pinching my mouth. What if I did? Also, if you have nothing to do, pinch your mouth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .