Anytime you pop something in your mouth and ANY substance comes out, it's time to see a doctor/dentist/shrink. I'm none of those, but it doesn't sound like something healthy. What if that's an infectious fluid you are swallowing or at the very least, swishing around in your mouth. Get thee to a dentist!
This is absolutely one instance that I am thankful as hell that I don't have a clue what you all are experiencing. <shudder>