The joy of eating grass, earthing and soft earth for litter!

Dear George, 
Please look at the photo attached and tell me what do you see?
Of course you see me and, by the look on my face, you probably think I’m being “interrupted” by something or someone from enjoying my grass! Correct? Ok! You are absolutely right! You see, sometimes I chew on this grass and sometimes I sit on it! 
Well, I was sitting on it a minute before this photo was taken but I did shy away when I heard my mummy’s comments! When she saw me sitting there she got excited shouting: “look, look I’m growing a Chicolino in a pot” She start laughing and run to get the camera! How silly! But, by the time she was back I was off the grass.

She took the photo anyway! Then she was telling daddy what a “smart boy” I was as I was earthing, I was grounding! I was what? I did not understand what she was saying!
I assume it was something good as she went on and on saying that most people do it in Europe (by the way, she walks bare feet in the backyard) She said she wish more people knew about this so they can create “grass boxes” for indoor cats so they can ground as well. George, please enlighten us: what is earthing? And how does it benefit us?

Yours,

Chico

PS. There's a website about grounding that she likes here

and cats earthing here. 

  Dear Chico,
I see a cat who has been rescued by Michelle from cold and hunger, and who is enjoying his grass. Grass is so good for cats and you can buy it in pet shops or even grow your own.
Of course, I just go outside and eat my grass in the garden or the nearby cart track. Am I grounded? Well, I am because my paws are on the lawn, on the rough stony cart track and on the soft earth of the newly dug vegetable patch - a really nice large litter tray for a cat. Aren't I lucky?
Not so sure about electrical currents from the earth but I know earth feels good to me. And I am all for earthing if it purrsuades humans to give us a large area of soft earth as a litter tray! There is also some evidence that indoor-only cats may be affected by toxins in the house. 
So cats there are reading this, please get a cat flap, or get some cat grass for your cat. And, if your human won't give you a nearly dug vegetable or flower patch, get them to provide a large litter tray with enough litter in it. At least two and a half inches.
I'm off outside to get grounded.... and maybe catch a mouse.
Yours
George.