“Synesthesia can manifest in so many ways, Dr Peacock explained to them. Words can have colors; sounds can have shapes, numbers can be illuminated. Some people were born with it; others acquired it by association. most synesthetes were visual. But there are other kinds of synesthesia, where words can translate as tastes or smells; or colors be triggered by migraine pain. In short, said Dr Peacock, a synesthete might see music;taste sound; experience numbers as textures or shapes. There was even mirror-touch synesthesia, in which, by some extreme of empathy, the subject could actually experience physical sensations felt by someone else–
‘You mean, if I saw someone getting hit, then I’d be able to feel it too?’
‘Fascinating, isn’t it?’ ”
Excerpt from “blue eyed boy”(Joanne Harris)