The Cupid's bow is a facial feature where the double curve of a human upper lip is said to resemble the bow of Cupid, the Roman god of erotic love. The peaks of the bow coincide with the philtral columns giving a prominent bow appearance to the lip; the phrase is common in literature used related to speech, therefore the mouth. Philtrum
The philtrum, or medial cleft, is a vertical indentation in the middle area of the upper lip, common to many mammals, extending in humans from the nasal septum to the tubercle of the upper lip. Together with a glandular rhinarium and slit-like nostrils, it is believed to constitute the primitive condition for at least therian mammals. Monotremes lack a philtrum, though this could be due to the specialised, beak-like jaws in living species. In most mammals, the philtrum is a narrow groove that may carry dissolved odorants from the rhinarium or nose pad to the vomeronasal organ via ducts inside the mouth. For humans and most primates, the philtrum survives only as a vestigial medial depression between the nose and upper lip; the human philtrum, bordered by ridges is known as the infranasal depression, but has no apparent function. That may be. Strepsirrhine primates, such as lemurs, still retain the philtrum and the rhinarium, unlike monkeys and apes. In humans, the philtrum is formed where the nasomedial and maxillary processes meet during embryonic development.
When these processes fail to fuse a cleft lip may result. A flattened or smooth philtrum may be a symptom of Prader -- Willi syndrome. A study of boys diagnosed with autism spectrum disorders found that a broader than average philtrum is one of a cluster of physical abnormalities associated with autism. In Jewish mythology, each embryo has an angel teaching them all of the wisdom in the world while they are in utero; the Angel taps an infant's upper lip before birth, to silence the infant from telling all the secrets in the universe to the humans who reside in it. Some believers of the myth speculate that this is the cause of the philtrum, but it does not have a basis in traditional Jewish texts. In Philippine mythology the enchanted creature diwata has smooth skin, with no wrinkles at the joints, no philtrum. In Key Largo, Frank McCloud tells a fairy tale to a child, saying that, before birth, the soul knows all the secrets of heaven, but at birth an angel presses a fingertip just above one's lip, which seals us to silence.
In the movie Mr. Nobody, unborn infants are said to have knowledge of all future events; as an unborn infant is about to be sent to its mother, the "Angels of Oblivion" tap its upper lip, whereupon the unborn infant forgets everything it knows. The movie follows the life story of one infant. In the movie The Prophecy, Archangel Gabriel asks Thomas Dagget, "Do you know how you got that dent in your top lip? Way back, before you were born, I told you a secret I put my finger there and I said'Shhhhh!'" In Action Comics # 719 the Joker says. This leads him to a Dr. Philip Drum. In the book Prince Ombra by Roderick MacLeish, the "cleft on our upper lips" is attributed to being hushed by a "cavern angel" just before we are born. Cupid's bow Intermaxillary segment Toothbrush moustache Philtrum piercing