(Image credit: Getty/EdenStuart) Getting older is a privilege. It’s a cliche, I know (and considering I’m not yet 40, one could argue I’m not even particularly equipped to repeat it), but every year, I feel like I know so much more: About the world, about myself, about relating to others. But ironically, one thing that can feel more mysterious as you get older is your own face. With every trip around the sun, our visages change, and parts once familiar can suddenly feel foreign—our eyes , our cheeks, and even our lips. “As we age, the lips naturally lose collagen and hyaluronic acid, which can contribute to thinning, dryness, [and] fine lines, as well as a blurring of the lip border,” says board-certified dermatologist Marisa Garshick , MD.…