... you can learn from:
The Sisters Brothers (2018)
Hermann: Typically when a man wishes another mana good day he smiles while facing the other person; butonce he passes by the smile drops from his face. Not you.Your smile remains on your lips after you've turned away.John: Well I hadn't noticed. It's common courtesy.Hermann: Not only that. Not everybody does it.You... take genuine pleasure in communing with others.