Philtrum. The divot between your nose and your lip. It has no purpose – it’s a spandrel, a byproduct of what happens when your face assembles itself while you’re a fetus and it’s not particularly sensitive, but it is a GREAT visual cue that you can use to draw attention to your lips. Dab of lipgloss right at the center of your top lip. Excellent.
It’s apparently also a good focal point for your attention while practicing yoga, according to friend Patrick.