Interesting you mention that - a friend of mine has that too, and I never knew it. Only a couple of years ago there was an article about it and I recognized his

Interesting you mention that - a friend of mine has that too, and I never knew it. Only a couple of years ago there was an article about it and I recognized his symptoms (and he himself, too). Apparently it is actually very common, is it something like 10% of people being affected?