I seem to remember reading that the "no bath during period" myth came from the time when women would bathe in the river and the menstrual blood at that time was considered unclean and would therefore contaminate the river. I suppose in the years when (tin) bath water was shared by all the family the same idea might apply.
Bought the wrong Hot Cross Buns 😩
Water Pollution -“ A National Disgrace”? A case for renationalisation?