People can also be lip - tied, which involves the frenulum that runs in the inside of the center of the upper lip. (exclusivepumping.com)
Traditionally, the tube is placed so that it enters the baby's mouth under the center of his upper lip, but many mothers find latching easier if the tubing runs over the baby's tongue — the exact opposite placement. (breastfeedingtoday-llli.org)
Direction for use: Start applying the matte lipstick from the center of the upper lip moving outward towards the corners. (tipsoye.com)