frown
... that it takes more muscles to smile than it does to frown?
... that it takes more muscles to <a href="./Smile" id="mwDBQ" rel="mw:WikiLink" title="Smile">smile</a> than it does to <b id="mwDBU"><a href="./Frown" id="mwDBY" rel="mw:WikiLink" title="Frown">frown</a></b>?