Niddah ... In Leviticus, the Torah prohibits sexual intercourse with a niddah and the prohibition has been maintained in traditional Jewish law. The laws concerning niddah are also referred to as taharath hamishpacha (Hebrew for family purity)...
Floor Cleaning ... Sawdust is used on some floors to absorb any liquids that fall rather than trying to prevent them being spilt. The sawdust is swept up and replaced each day...
Cleanliness ... In emphasizing an ongoing procedure or set of habits for the purpose of maintenance and prevention, the concept of cleanliness differs from purity, which is a physical, moral, or ritual state of freedom from pollutants. Whereas purity is usually a quality of an individual or substance, cleanliness has a social dimension, or implies a system of interactions...