system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Given the number and types of bacteria in our mouths, why is it that cuts/ulcers in our mouths don't get super infected very quickly?

I've heard that the human bite is one of the most dangerous because of the types of bacteria in our mouths and teeth. Knowing this, wouldn't cuts to the inside of our mouths (tongue, cheek, inner lips, etc) also be very dangerous?
gpt
The bacteria we live with are well known and quickly recognized by our immune system, which is ready to kill them if they find themselves were they should not.

It's always the same bacteria in your mouth so your blood has lots of antibodies ready.