> bascially saying "You should look more pleasant for my benefit." Perhaps not. http://www.scientificamerican.com/article/smile-it-could-make-you-happier/ htt

> bascially saying "You should look more pleasant for my benefit." Perhaps not. http://www.scientificamerican.com/article/smile-it-could-make-you-happier/ http://www.scientificamerican.com/article/smile-it-could-mak... Tone of voice and mannerisms tell a much fuller story, though.