I was a little baffled when I learned that adults were queuing up to be diagnosed with autism. I know a number of parents want their children to be somehow special even if they are not - but adults? Then I found out that social media is telling folk that many of history's geniuses, your da Vincis and Einsteins, would almost certainly be diagnosed these days as being on the autism spectrum. Suddenly it all made sense. By the way, I do believe in autism but suspect that there have been some dodgy diagnoses made in the past.