Magic Markers

Why do people place a magic marker upside down in a pencil/pen holder? What happens to people's brains who do this?

1) I have never seen a magic marker that leaks when in the down position. (Unless if somehow it was broken.)

2) Do people know that gravity pulls toward the earth?

What we know:

A. Gravity pulls towards earth.

B. When you place a magic marker upside down to store it, the ink runs to the back end of the marker.

C. When you use a stored upside down marker, there will be less ink at the tip of the marker when you write.

D. If you insist that magic markers are stored upside down, why even buy them or use them?

Why does common sense go out the window for people who dispute this point?