Eli5: why does our brain tell us that some smells are good, flowers, and some smells are bad, pig pen.

Question

Eli5: why does our brain tell us that some smells are good, flowers, and some smells are bad, pig pen.

In: Biology

Answer 1

Usually it’s a matter of how it would help or hurt our safety. Bad smells are often things which are toxic or infectious – nasty chemicals, rot, defecation. Good smells are things like good food, sweet fruit (which is similar to the smell of flowers), clean fresh air.