For a few moments, consider your philtrum.

“My what?”

Your philtrum.

Assuming no disfiguration due to accident or disease, you most definitely have a philtrum, and you probably see it every day, although you may take it for granted and overlook it, even though it’s as plain as the nose on your face. It’s also quite close to your nose.

“So what is it?”

Your philtrum is that little depression between your nose and your upper lip. You’ve had it since you were born, and you will have it until the day you die. Actually, you’ll have it for a few days after…