We've all heard that it takes less muscles to smile than to frown. We've also heard that frowning causes more lines and wrinkles than smiling. Whether this is true or not, doesn't really matter, does it?  Frowning and smiling, both are contagious, easy, quick and cost nothing, but...

Are your facial expressions on auto response?  When surprised, do you automatically raise your eyebrows; when worried, does your forehead crunch up; when upset, do your lips fall into a frown? Maybe your auto response is on smile or on neutral - no facial expression...