Heather McElhatton talks to James Wannerton, who has a neurological condition called "lexical-gustatory synesthesia," which allows him to taste sound.
Every sound he hears causes a taste to fire in his mouth. Even the barks of his dogs have specific flavors and textures.
To better explain his condition he mapped out the entire London Underground with stations and their corresponding flavors.
Wannerton's map was recently published in "The Best American Infographics 2014."