Urine has dozens of uses historically, including as a detergent, at least since Roman times. Also as a an ingredient for setting dyes, with pregnant women’s uri

Urine has dozens of uses historically, including as a detergent, at least since Roman times. Also as a an ingredient for setting dyes, with pregnant women’s urine being especially valued for this. So valued that pregnant women could actually sell their own urine during medieval times. It’s hard for the modern mind used to modern chemistry to wrap around just how cleverly people used the chemicals available to them.