"Synesthesia is an involuntary joining in which the real information of one sense is accompanied by a perception in another sense."
-R. Cytowic, "Synesthesia: A Union of the Senses"
Synesthesia is one of the most fascinating topics in popular neuroscience. Read more here, and listen to this great Radiolab episode for further exploration of the subject. As a kid, I remember associating the days of the week with certain colors, and I pictured months, years, and decades in a sort of mental map. My highly unscientific speculation is that most people experience some form of mild synesthesia.
This drawing was a self-rejected sketch for an upcoming submission. Exciting things are happening for Incidental Comics - keep reading in the next few months for details!