Today I helped Thomas Valdemar from the text and copywriter class with a Synesthesia ( http://en.wikipedia.org/wiki/Synesthesia ) project.
In short synesthesia is a form of “cross-sensing” that some people have. For example they can hear colors, see sounds, and taste touch.
Marian Mena (singer) sees music in colour, something that can make it difficult for other people to understand when she is trying to explain and write her music.
Imagine thinking of pork meat everytme you see a butterfly.