PS

The smile is under threat of extinction from the ‘caved-in duck face’ look, that go-to pose of all young wannabes. In a new book, The Smile Revolution, Dr Colin Jones tells how before the smile became popular in the late 18th century it was used only to depict ‘plebians and the mentally deficient’. So if history really does repeat itself, the duck-face is guaranteed to soon become our everyday look.