As you can see, I'm still obsessed with smells today.
I know this guy who doesn't have a sense of smell. I don't know if he was born that way or if it developed over time, but his nose has taken a permanent vacation. The cool part is that his sense of taste has moved in to compensate. Usually, people can only taste the basics: sweet, bitter, etc. Our noses are what give us broader and deeper tastes when we eat.
This kid's mouth has stepped in and has managed to duplicate what the nose should be doing.
So, what is the huge downside to this?
Just think of what happens when someone farts. You guessed it. While the rest of us just plug our noses, he walks around with a pretty nasty taste in his mouth.