The problem is, the type of synaesthesia I encounter is heavily colour-oriented. This is a problem due to my colourblindness and a lack of a test capable of fully diagnosing my condition without being reliant on true colour perception.
Colourblindness is another thing that is largely misunderstood. Most people I have discussed synaesthesia with haven't even heard of it but most are aware of colourblindness even if they are ignorant of the true meaning of it. The response tends to be 'Oh, you're colourblind? What colour is this then?' *holds up random object*
More militant or irritable colourblind people have been known to follow that question up with another question, along the lines of 'if I were in a wheelchair would you ask me to stand?' I don't go in for that sort of histrionics but it is a sort of a disability in that it's something that I and others can't do that most people can.