That's why mewing corrects posture and head alignment (Water and DNR)

[turneywest]

When you press your tongue on the roof of your mouth, the muscles of the back of your head tense up, which helps you stand up straight and tilt your head down. You tilt your head down because you unconsciously want to stretch the muscles of the back of your head that are tense. You can lie down and put your head on the back of a sofa (or on something else) and try pressing your tongue on the roof of your mouth, and you will feel how the muscles of the back of your head contract.

I know this thread will be deleted