>>14139577I think I'm more sensitive to this sort of thing, shouldn't have made it seem like everyone should consciously be able to not just tell but tell why.
I'd say both are fake in any case. A more specific giveaway is usually the outside edge of the eye (
>>14139561 is a good example). Anyone else is of course free to weigh in.
TL;DR: Some measure of involuntary squinting usually accompanies genuine full-blown smiles.