How about
Synesthesia? That has always fascinated me. I wonder what it would be like to have that.
Thanks for that link. I heard about that condition once, but forgot the name. When I read about it I thought I always had a mild number-related case of it. Ever since I knew what numbers were I associated them as being "hot" or "cold". Hot numbers were like 3,5, and 6. Cold numbers were 2,4,7,9. 1 and 8 were kind of in the middle. Hot numbers were associated with bright colors like red, orange and yellow. Cold numbers were blue, or green, or black. Brown would be a hot color though. Strange that there are such specific and odd disorders in the world, but they are definitely shared by different people.