That scratchy feeling

How many of you scratched your nails on a blackboard or something similar?

Yes, I can feel you squirming now.

Its not a nice feeling. In fact, the feeling is like you kissing your dog and letting it lick your face and then discovering it was eating faeces moments ago. Its not the screeching sound which gets to me but the feeling of the nail on that surface.

My nail is long.
My nail is dry.

I have a long, dry nail,
Scratching all day long.

And scratching,
And scratching.

I took a garden shear,
and sheared it off.

Now I don't bleed to Death
When I dig my nose.