For whatever reason, when I press a finger to the sides of my face, the place that is right before the ear (right index finger to right side and left index finger to left side), I seem to always easily stay in tune while singing. When I don't do this, I still pretty much sing in tune but it takes a bit more effort and I sometimes sing an out of tune note. Why in the world is this? Is this a real way to stay in tune or am I just tricking myself?