Arathors wrote:
Eyes are very important in the smile; they're part of how people discern fake smiles from real smiles. A real smile - also called a Duchenne smile - uses muscles around the eyes. It can be faked, but most people don't think to do it because they're too focused on the mouth aspect. They just don't think about it, because picking up on the eye muscle contractions is automatic for them. As a result, they say a fake smile "doesn't reach your eyes", even if they don't know anything about Duchenne.
Facial expressions can be difficult for me sometimes - more so with masks, of course - so I look for crinkles around the eyes, without furrowing of the brow, to distinguish a "real" smile. But it's not foolproof. The right side of my face is less expressive than my left; I've got less subconscious muscle control over it. So I'll deliberately smile more with that side of my mouth to even things out, because otherwise my smiles look like smirks. But getting a Duchenne smile on that side is difficult for me, even if I mean it. I can look in a mirror and do it, sure, but not at speed in a conversation.
I feel like actual like smiling where teeth show is hard for my physically, but my jaws got a slight misalignment in the past quack orthodontists convinced my mom to get me braces so I suffered those for a couple years when it turns out to actually get my teeth aligned fully correctly I'd have to have jaw surgery. And not willing to do that, its not visible on the outside like my face does not look crooked or anything so I don't think it's worth it.
Not for certain if that is the reason that sort of smile is hard but seems possible.
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