It depends on what language you speak. For English speakers for instance, yes, that is the natural position of the tongue. For let's say Russian, the tongue is naturally laid along the bottom of the mouth.
A boss of mine used to make us do these mindfulness exercises for 15 minutes before the work day. While everybody else was closing there eyes and "feeling their feet on the floor" I was farting around on my phone. I hate shit like that.
Without looking in the mirror, I knew I looked absolutely hideous doing so
Stress is an ugly look