Why do farts not stink?

Answer 1

Farts may not stink when they primarily consist of gases like nitrogen, oxygen, carbon dioxide, and methane, which are odorless. The unpleasant smell often comes from small amounts of other gases, such as hydrogen sulfide and ammonia, produced during digestion. Factors like diet, gut bacteria, and individual metabolism can influence the composition of intestinal gas and its odor. Therefore, a fart can be odorless if it contains minimal smelly compounds.