Outside the cities, the Romans did not build any public toilets, so travellers in need went to the bushes. On one of the ancient Roman tombstones near Rome, there is an interesting inscription:
Qui hic minxerit aut cacaverit, habeat deos superos et inferos iratos!
that is: He who urinates or defecates here, may he have the gods above and below angry!
As tombstones were erected by the roads, there must have been some mistake attempts to contaminate the “last resting places”.