I stumbled across this online. Synesthesia. As a nurse, I seek to expand my knowledge base constantly. I do not have synesthesia. Do you? Check out the website and find out.
Synesthesia is experiencing one sensation (such as smell or sight) and associating another, unrelated sensation (such as touch or smell).
When I see the number 3, I associate the letter R. This is apparently not synesthesia. I wonder if this has a name.