answersLogoWhite

0

Bowel movements smell because while the food is mixed together it also has acids and digestive juices added. Types of foods plus the breakdown of the foods causes it to have an odor. Urine smells because of the same digestive process, plus because the body filtrates toxins from the blood into the urine. It is believed that in cave man days, these odors prevented humans from eating or drinking their own wastes (which can cause illness), just like with vomitus. However, many animals do return to eat their own waste and vomit, for example, canines.

User Avatar

Wiki User

15y ago

What else can I help you with?