You know the drill
In his Physiognomische Fragmente, published between 1775 and 1778, the Swiss physiognomist Johann Kaspar Lavater insisted that ‘clean, white and well-arranged teeth … [show] a sweet and polished mind and a good and honest heart’, while rotten or misaligned teeth revealed ‘either sickness or else some melange of moral imperfection’. Whatever one might think of
