One bath when your born and one when you died was all that was considered necessary. And yes, the stench must have been God-Awful! But you also have to remember that they let their animal sleep in the house (sheep, goats and cows, not just dogs and cats). It got the animals out of the cold (and was additional heat for the family) and kept them safe form robbers. Also they did their "business" in a pot then just threw it out into the street. So you would have raw sewage in the streets. Being sanitary was not of great importance.