Ian - I don't really know!

[As for a reason, I recall George Smiley asking Peter Guillam in "Tinker, Tailor, Soldier, Spy" - "Reason as motive, or reason as logic?"]

I've just fitted my G7 arsey-versy on to my fretboard in the "upward" position - and it felt really weird. Like having your nickers on back to front, and just as awkward.