Although it sounds rather funny, and certainly less inconvenient than being blind or deaf, people with Anosmia have no way to tell if their food is still fresh. They can't detect a gas leak or smoke. They have no idea about their own body odor, making them insecure and anti-social.
And for us, it's a perfect opportunity to dig into our musical knowledge and pick out a few tunes about smelling. Enjoy.
Found out more about Anosmia on Wikipedia