Editing Smile (section)

{{Short description|Conscious or unconscious facial muscular movement conveying happiness or pleasure}}
{{About|the facial expression|other uses|Smile (disambiguation)|and|Smiles (disambiguation)|and|Smilin'}}{{distinguish|Simile}}
[[File:Leonardo da Vinci 043-mod.jpg|thumb|Detail of the [[Mona Lisa]], who is known for her smile.]][[File:Little_kid_smiling..jpg|thumb|A smiling child.]]
A '''smile''' is a [[facial expression]] formed primarily by flexing the [[muscle]]s at the sides of the [[mouth]]. Some smiles include a contraction of the muscles at the corner of the [[eye|eyes]], an action known as a Duchenne smile. 
Among [[human]]s, a smile expresses [[wikt:delight|delight]], [[socializing|sociability]], [[happiness]], [[joy]], or [[amusement]]. It is distinct from a similar but usually involuntary expression of [[anxiety]] known as a [[wikt:grimace|grimace]]. Although cross-cultural studies have shown that smiling is a means of communication throughout the world,<ref>{{cite book |first=Carroll E. |last=Izard |year=1971 |title=The Face of Emotion |location=New York |publisher=Appleton-Century-Croft |isbn=978-0-390-47831-3 }}frown</ref> there are large differences among different cultures, religions, and societies, with some using smiles to convey confusion, embarrassment, or awkwardness.