Here you go mrs.
[url:1wn8ksqg]http://www.sdahq.org/sdalatest/html/soaphistory1.htm[/url] wrote:A soap-like material found in clay cylinders during the excavation of ancient Babylon is evidence that soapmaking was known as early as 2800 B.C. Inscriptions on the cylinders say that fats were boiled with ashes, which is a method of making soap, but do not refer to the purpose of the "soap." Such materials were later used as hair styling aids.
Records show that ancient Egyptians bathed regularly. The Ebers Papyrus, a medical document from about 1500 B.C., describes combining animal and vegetable oils with alkaline salts to form a soap-like material used for treating skin diseases, as well as for washing
The point was that anyone understands that you should use running water if you bath in it for seven days, because even in the prehistory you could see that you got clean and the water dirty...