The natural occurrence of the sound mmm. Have you ever learned something new that resonates with you and your instant response is mmmmm or even a short hmm. A very subtle untaught acknowledgement of saying….What exactly? When else does it happen.. eat something good and you may say mmm in satisfaction of taste. Can ideas that demand you to think differently pleasure or excite the brain in a way familiar to a delightful taste? Just some food for thought.