8. I should be obliged, therefore, if my critic Aemilianus would answer me and tell me whether he is ever in the habit of washing his feet, or, if he admits that he is in the habit of so doing, whether he is prepared to argue that a man should pay more attention to the cleanliness of his feet than to that of his teeth. Certainly, if like you, Aemilianus, he never opens his mouth save to utter slander and abuse, I should advise him to pay no attention to the state of his mouth nor to attempt to remove the stains from his teeth with oriental powders: he would be better employed in rubbing them with charcoal from some funeral pyre. Least of all should he wash them with common water; rather let his guilty tongue, the chosen servant of lies and bitter words, rot in the filth and ordure that it loves! Is it reasonable, wretch, that your tongue should be fresh and clean, when your voice is foul and loathsome, or that, like the viper, you should employ snow-white teeth for the emission of dark, deadly poison? On the other hand it is only right that, just as we wash a vessel that is to hold good liquor, he who knows that his words will be at once useful and agreeable should cleanse his mouth as a prelude to speech. But why should I speak further of man? Even the crocodile, the monster of the Nile--so they tell me--opens his jaws in all innocence, that his teeth may be cleaned. For his mouth being large, tongueless, and continually open in the water, multitudes of leeches become entangled in his teeth: these, when the crocodile emerges from the river and opens his mouth, are removed by a friendly waterbird, which is allowed to insert its beak without any risk to itself.