But is it though? There's the old saying that people will treat you the same way that you treat them (not a universal truth by any measure though). If you prese

But is it though? There's the old saying that people will treat you the same way that you treat them (not a universal truth by any measure though). If you present different social cues based on the way you're feeling -- and these can be damnably subtle -- then people might actually be nicer in casual, every day interactions, rather than just seeming so. I don't know how you'd test this though.