This is a proverb from multiple cultures that caught my attention.
Oral Myasis: a rare condition in humans and is associated with poor oral hygiene, severe halitosis, mouth breathing during sleep, mental handicap, cerebral palsy, epilepsy, anterior open bite, incompetent lips, and other conditions [source].
So basically, a fly can lay eggs inside your mouth while you're mouth breathing during sleep. Then those eggs can hatch and the maggots start eating your lips, cheeks, maxilla. Ahhhhhhhhhh!
So there you have it. Nightmare fuel for the night-time mouth breathers. You're welcome.
Remember this pain... and let it activate you.