We need consistent sets of hands, unless I have to become a hand photographer.
The same hand (handedness - right or left), sex (size, smoothness, jewelry and nail polish, or not), complexion.
So we can mix writing implements, push with one hand, push with two hands, etc.
If you think it doesn't matter, ask the Senior Market Manager of the multi-billion $$$ OEM I'm trying to sell too who asked me 'what's the deal with the different hands?'.
Thanks, posted support for idea