Left/Right

You know it. Yes!
You have it. 

’See that vein on your cheek?
Like a faint streak of paint,
the fascinating blue-green line -?

I don’t know if it runs up or runs down;
’don’t know if it throbs;
if it’s innate, or has a story to tell.

I don’t know if anyone mentions it;
if anyone dreams of it;
if anyone, besides me, is amazed by it,
but you know it exists. You know where.
You know, right?
Well then, that’s Right.
And the side that’s left
has to be the Left, hmm?