A smile is a facial expression formed primarily by flexing the muscles at the sides of the mouth. Some smiles include a contraction of the muscles at the corner of the eyes, an action known as a "Duchenne smile". Smiles performed without the eye contraction can be perceived as "fake".

Among humans, smiling is an expression denoting pleasure, sociability, happiness, or amusement. It is distinct from a similar but usually involuntary expression of anxiety known as a grimace. Although cross-cultural studies have shown that smiling is a means of communication throughout the world, there are large differences between different cultures, with some using smiles to convey confusion or embarrassment.

https://en.wikipedia.org/wiki/Smile

Agent NL-20 Whatever Shark Woman Anthro Bloody Smile You

Found her. Isn't she wonderful, mister Agent NL-20/35 ? ☆・゜゚・(^O^)/・゜゚・☆

Love Smile

I'm Really Excited To See Sean. I Arrived To The Airport Two Hours Early...

Deep sea Bioluminescence Smile Sea creature

Angler Fish rarely looks happy when she smiles. I drew this in a little over an hour, pretty...

Molly Smile Girl

Use Gimp to add some freckles with the pressure sensitivity http://vvcap.net/db/SwvCqKoMgmgar7qXOxPP.htp

"Better by far to embrace the hard truth than a reassuring fable."
Carl Sagan
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