Like a lot of old “wisdom” there’s no facts to back this one up. You actually use more muscles to smile than to frown http://www.straightdope.com/columns/read/2489/does-it-take-fewer-muscles-to-smile-than-it-does-to-frown/
Like a lot of old “wisdom” there’s no facts to back this one up. You actually use more muscles to smile than to frown http://www.straightdope.com/columns/read/2489/does-it-take-fewer-muscles-to-smile-than-it-does-to-frown/