As my colleague advises, Asperger's Syndrome is a form of autism, explained wonderfully in the aforementioned novel. Sufferers can use all their senses, but do not interperet the information they receive in the same way. they can develop single-minded obsessions with colours, foods, words, and behaviours. They find it extremely hard to relate to people because they don't process any body language signals, and sometimes take all verbal information completely literally. In tandem with that is a prodigious mental power of the type exhibited by savants, often linked to maths and number concepts. I strongly advise you to read the book, it's awesome.