the mouth is crucial in forming facial expressions and is subject to much interpretation. Since people’s lips grow thinner with age, full lips are associated with sensuality. Slightly open lips may seem relaxed or even suggestive (which is why most models pose this way), but a mouth that cannot close (á la Napoleon Dynamite) can give the impression of perpetual stupefaction. A wide mouth is often called “generous” and can convey a sense of openness, whereas a small, narrow mouth (think Hough Laurie from “House”) may seem reserved or unfriendly.