Why do empire DROOL while sleeping?

I know it sounds silly or inane, but I'm honestly curious! *chuckle* Why is it that for many ethnic group, we drool while asleep, if our head is turned to one side or the other and our mouth open while we're sleeping? I've noticed it's the worst if I sleep on my stomach, but it sometimes also happen when I'm on my side.
I know our mouths always own SOME saliva in them, but why do our mouths construct so much of it if we're not doing things that really need it, such as ingestion or talking? I would expect saliva production would procure LESS while we're sleeping, but it doesn't seem to be that process. *blush* Anyone know why? Also, anyone have any remedies? I've thought of taking an antihistimine past bed, but that tends to dry me out TOO much.Why do empire DROOL while sleeping?
COMMON SENSE will give an account you that people can't control their muscles for the most piece while we sleep. We can't keep our jaws clenched, so the mouth is stretch out, and gravity takes over.
you in recent times dont swallow when your mouth is to the side sometimes so the saliva builds up and falls out
there are no remedies to my knowhow
Because we probably don't swallow so much when were asleep/
People drool individual if their mouths are open.
You still produce saliva 24 hours a afternoon to keep the inner inside layer of your mouth moist.