#13 Urine contains acids and chemicals that remove stains from organic textiles... so yeah, wash with urine and RINSE with water and get whiter cleaner clothes. Just because urine is now wasted, and not good to use anyway due to modern diets, doesn't mean people of the past were stupid!
Earlier, it was mentioned that the Colosseum hosted staged naval fights. Research shows they achieved this by flooding the colosseum with five to seven feet of water.
#13 Urine contains acids and chemicals that remove stains from organic textiles... so yeah, wash with urine and RINSE with water and get whiter cleaner clothes. Just because urine is now wasted, and not good to use anyway due to modern diets, doesn't mean people of the past were stupid!
All historic evidence is just stories. So, just because you don't know of it doesn't mean it doesn't exist...