system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: When someone wants their back scratched, the scratchee should be responsible for moving their back around the scratcher's stationary hand

People who find themselves with an itchy upper back require help to get the relief they desire. Traditionally, this is accomplished with a conversation like:

>Could you scratch my back?  
>  
>Higher. Left. Left. No, more towards the shoulder. Almost. No, a little bit back the other way.

This is frustrating for both parties, since it's hard to describe a specific part of one's back, and because the itch can move around once scratching begins.

Instead, the scratcher should hold their claw-hand stationary in front of them, and the scratchee should move their back around the hand as necessary to find the precise position needed. They can then say "right there!" to ask for vigorous scratches at that location.

Edit:  I should specify that for maximum efficiency and ergonomics, the scratch-dance should start with the scratcher's hand in the middle of the scratcher's back. 

Change My View!
gpt
It's not always feasible for the scratchee to move to the scratcher's hand. Suppose, for instance, that the scratcher put their hand on your back somewhere between your shoulder blades, but your itch was actually much lower. You could stand on your tippie toes and still not be able to get your itch into position to be scratched because the hand is too high. In a situation like that, the scratchee would *have* to ask the scratcher to move their hand lower.