What Kind of Smile is He Flashing?
He may be happy to see you, but the grin could mean more...
If there aren’t wrinkles around his eyes and the corners of his mouth point towards his jaw, he’s probably only being nice.
A smile with the inner corners of his eyebrows pointing up indicate sadness; chances are, he’s empathetic.
Is he smiling with just one side of his mouth? Yes, it could be a charmingly crooked grin, but he could also be feeling scornful or superior.