Jonathan Livingston Seagull by Richard Bach.
Eating lunch yesterday I wanted to try talking with a full mouth. Reflexively I switched the bolus to the left side of the tongue. I felt like I limited the left tongue instinctively in a sense stabilized it so the right tongue had the freedom to talk. I then switched to left tongue mode and moved the the bolus to the right on purpose. It seem to clarify some the way I instinctively use my tongue.