The Carmina of Caius Valerius Catullus
We, maids and upright youths, are in Diana's care: upright youths and maids, we sing Diana.
Egnatius, who has milk-white teeth, grins for ever and aye. An he be in court, when counsel excites tears, he grins. An he be at funeral pyre where one mourns a son devoted, where a bereft mother's tears stream for her only one, he grins. Whatever it may be, wherever he is, whate'er may happen, he grins. Such ill habit has he - neither in good taste, well assumed, nor refined. Wherefore do thou take note from me, my good Egnatius. Be thou refined Sabine or Tiburtine, paunch-full Umbrian or obese Tuscan, Lanuvian dusky and large-tusked, or Transpadine (to touch upon mine own folk also), or whom thou wilt of those who cleanly wash their teeth, still I'd wish thee not to grin for ever and aye; for than senseless giggling nothing is more senseless. Now thou'rt a Celtiberian! and in the Celtiberian land each wight who has urined is wont each morn to scrub with it his teeth and pinky gums, so that the higher the polish on thy teeth, the greater fund it notes that thou hast drunk of urine.