there must be limits, but so far I haven't found one. I even, in my fairly drunken state, remembered the Russian for 'do you mind if I use your toilet', while nipping into a bar in St Petersburg on my merry way back to Ligovskii Prospekt. I may have been born with it, but I don't think I was ever drunk as a child.
[flerdle] It would be interesting for sure. I've been fairly close to the equator but never below it [see? I still see north as 'up' and south as 'down'] Can relate to everything you said earlier about observation, map usage, etc. Even as a child I had a compulsion to know where I was placed and was first to a floor plan, street plan or map - it made my day when faced with one of those pictorial street guide display thingies with a big fat arrow saying YOU ARE HERE!