Question #69720
1 Answer
Nov 23, 2016
I don't want to be "that guy", but I can do this.
Explanation:
Admittedly it is quite difficult, but only as difficult as doing two different actions with different parts of the body.
I would guess that it is the same reason that patting your head and rubbing your stomach at the same time is difficult - the mind was not designed to be able to concentrate on two things both actively and simultaneously.