Sounds a lot like #1 Son. Or me, to a slightly lesser degree. If there is nothing to be done about it and there is nothing "wrong" then I'd hesitate to call it a "syndrome" - it sounds more like a personality type, albeit an extreme one.

Funniest thing I ever experienced with was when we invited another family from church over for dinner. I made the mistake of mentioning that my son was interested in penguins at the moment. The father immediately started in with "There are 17 species of penguins, not counting those that are extinct..." The two of them proceeded to converse continuously for the next 3 hours. He later explained, "Penguin guys are few and far between, so when you find one you have to talk shop." He's a PhD Geologist….

Me, I'm an extroverted engineer - I stare at the other guy’s shoes instead of my own.