Why do we smell things like cigarette smoke or farts even when we hold our breath?

Question

.

Answer 1

There is such a thing called passive smelling. It happens when the air containing the molecules with the scent are unintentionally blow up into your air passages by the wind, a fan, or something similar.

Answer 2

Because you don't smell with your lungs.

Answer 3

Because you don't smell through your mouth!!!!