My personal take on smiles is that they're welcome if genuine, but can have adverse effects when forced. Many people think that displaying a fake smile for example at the workplace would help with interactions, especially professional ones, but rest assured that when I see someone faking a smile, particularly those working hard to look warm and sincere, I immediately feel I could be manipulated and get on the defensi…
I guess you can't have the best of both world for this stuff.