In the really olden days, people used to collect urine, let it set around a while, then wash their clothes in it.
According to our guide, the laundry service would accept just about any kind of urine, but supposedly zebra and giraffe urine were greatly coveted. After washing laundry in urine and rinsing, the laundry would be “smoked” to help get rid of the ammonia/urine smell.
Thanks for the additional info. Hadn’t known that about the zebra and giraffe urine.