Most people take our sense of smell as a right. But have you ever ever considered what it might be wish to not be ready to smell something?
The complete loss of smell known anosmia while not your sense of smell, food tastes totally different, you cannot smell the scent of a flower, and you may end up in a dangerous situation, unknowingly.
For example, while not the power to find odors, you would not smell a gas leak, smoke from a hearth, or bitter milk.