system
Given the following post, respond as if you're commenting on Reddit:
human
eli5: Why is it that when you accidentally bite your lip or your tongue while eating, you are now destined to bite that same spot over and over for sometimes days on end?
gpt
It tends to swell which makes it easier to bite again and again. It's also more painful, so you're more likely to notice when you DO bite it. Finally, if there's mechanical/habit issues with the way you chew or contributing factors from the shape and positioning of your teeth, you might have a natural predisposition to bite that area.