The Economist chats with Oliver Sacks:
One doesn’t tend to think of oneself of having a condition. Especially if others in the family have it, they attribute it to "the way we are". Once after giving a talk on tourettes in London I took a taxi and the cabdriver was a flamboyantly tourettic, cursing, jumping on the roof. And I asked him very shyly if he had tourettes, which he denied indignantly. It is not easy to recognise a condition until it is pointed out: dyslexia is one of them, and it affects 10% to 15% of the population.
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