Very rarely does music produce a synesthetic effect in me, but there are two major exceptions: "Dream On" by Aerosmith and "Smooth" by Rob Thomas and Carlos Santana. When I listen to either song, and I first heard "Dream On" when I was 5 or 6, I perceive in my head a deep, dark red color that is pervasive as the song plays. The red color seems oppressive, but it is enjoyable regardless, and greatly adds to the enjoyment of these two songs.
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"You have a responsibility to consider all sides of a problem and a responsibility to make a judgment and a responsibility to care for all involved." --Ian Danskin