Ever thought about it?
If you have one: do you move and the "map" is stationery or vice versa? Is
it in 2D space or 3D space? Is it in color? where is October? (can you point
to it in space)
Once you've drawn your map for the span of a year, try drawing your own
personal "timeline for world history" since mine exists in three-dimensional
space, it's a little tricky - I've thought about doing it in wire. Where is
1600? (point to it in space).
At first I thought more women had them than men, but that is no longer the
case. It may be a right brainer thing after all.
PS- I could only study for art in-the-dark exams by writing my notes in
different colors - for example - my notes on a 500bce Greece vase were blue,
because 5 is a blue number and because "Greek" has 5 letters. It took my
whole big sets of felt tips and prismacolors to study for exams. The 1700's
were pinks. My roommates thought I was a fruitcake.