It happens when the travelers are getting into such places and conditions when they do not have the opportunity even to get a bathe or brush their teeth...
The new profession in China - "Toilet Guide". The representatives of this profession are to stay on duty on the city streets to tell the pedestrians where the nearest toilet is located...
If you are traveling to Florence and have decided to please yourself with delicious wine - don't be over-diligent, or you take the risk to pay a serious fine.