A mouth help you eat
well basicly they help, like your mouth helps you to ask such a ridiculas question.
They help your vagina vibrate in my mouth
mouth
With the help of its mouth.
It could. The mouth guard can help by taking pressure or force away from the brain area. But mouth guards are made specifically made to help prevent any kind of mouth injury. You shouldn't wear a mouth guard to try to prevent a head injury.
Salivary glands.
With your mouth. Hope this will help you out
mouth wash or breath mints
There is nothing you cannot help doing when you yawn. You do not even need to open your mouth - it is certainly possible to yawn with a closed mouth.
They can eat. and breathe
help open and close your mouth
put salt on it