The emoji is a mouth with the top teeth biting down on one side of the lower lip. It is typically used in romantic contexts as a form of flirtation or arousal. According to What Emoji, the biting ...

Bad habits. Some bad habits can cause gaps in your teeth. If you regularly bite your lower lip or suck on your fingers, this puts pressure on your front teeth and causes them to push outwards.

Generally, mouth guards cover your upper teeth only ... They can help prevent tooth, lip, and mouth injuries. A boxing mouth guard can be stock, boil and bite, or custom. Football mouth guard ...