It's a law of computing: the moment some otherwise intelligent people sit down in front of a computer, their brain turns to mush. I once had to try to explain to somebody what a left-click was, since they insisted on right-clicking everything.
I ended up describing a left-click as a wrong-click. somehow wrong and right are opposites but not right and left.
Or:
"Ok, not left click the icon"
"Left... that's the opposite of right, isn't it?"