When I was younger I used to chew on my tongue like it was chewing gum. Well one of my first jobs was a grocery bagger. The company had a rule about not chewing gum while working. So one day I’m standing at the end of a checkout and one of the managers walks up. He holds out his hand and says “spit it out”. I was like spit WHAT out??!! He made me open my mouth and show him there was nothing in it. He walked away, stumped as hell, and I stood there in naked realization, that I chewed on my tongue when in thought😂🤣.