Continuing that line of thought...yes, there are some (relatively few) that have a bleeding of their senses so to speak. I saw a whole show on this on the Science channel, which also covered the real Rain Man. As mentioned, some people associate colors with numbers, but they also told of a guy who tastes words. He's a bartender no less, and certain words and names trigger the sensation of tasting different flavors. And there are others who do "see" sounds, like music. Particular notes of a scale trigger the same colors all the time, so like an Eb will be brown, or whatever. Wicked stuff.