Mary Beard, probably the most respect alive scholar on ancient Rome, already explained that in this excelent documentary about daily life on Pompeii: https://ww

Mary Beard, probably the most respect alive scholar on ancient Rome, already explained that in this excelent documentary about daily life on Pompeii: https://www.youtube.com/watch?v=LSw7eoBbM0U https://www.youtube.com/watch?v=LSw7eoBbM0U She explains it at 20:51.