So I'm thinking about synesthesia today. Actually, I started thinking about it last night, but that's not the point.
Synesthesia, as Wikipedia defines it, is two bodily senses combining, like sound and sight to make music have color. Or sight and taste, so that words and letters have flavors. Or even better, the personification of letters. If you read the Wiki, you'll see quotes about not being able to trust the number 3, or how Ts are "crabbed and ungenerous".
Supposedly this is more common than people think. Meaning, it's not something that one in a million people have. Wiki (which is not always right, I know) says it's more like one in 23.
And of course I'm going to oversimplify it by saying how fascinating I think it is. To see color when hearing music? How much more interesting (and distracting, yes) would that make the world?
What if the world were reversed and people who *didn't* do such things were the one in 23? Imagine a person who lacked the ability to smell sounds or color by music in a world where that was the norm.
...and they wonder where writers get their ideas.