I don't know if thats unusual or not. Me and my dad (who are both on atkins) have done that a few times, Just laughing with each other... i havent done it recently but we found it sort of empowering in some strange way. We did it with Wendys hamburger buns (they have great buns. ha) we were like.. see this bun aint so good.. insert into mouth, chew it a few times.. then pretend it was sickening and spit it out... If your doing it ALL the time, then yeah it could be a prob, But your not alone.. i have done this before.