Rest your body,

in lying position, raise the right leg and 

rotate , clockwise; at the same time, 

try to write 6, 

by moving,

your right hand in air; your right leg autonomously either stops, 

or 

you feel,

as if, it also wants to move anticlockwise!

Try,

on left leg moving it anticlockwise

&

move left hand in air, to write 6,

to your wonder,

you won't find any problem.

On the contrary 

both; 

the left leg & left hand,

keeps moving,

in coordination & smoothly.

But try to write 9, with the left hand

&

Left leg,

again we feel,

that 

it wants to move clockwise.....

Younger or elder,

mostly you will have to go,

in role play.

And as it is a puzzle

try to scratch your brain, 

come out 

to

communicate to answer 

Or

to seek answers.

Bye till then...