Fingers Crossed

So about this phrase... "Fingers Crossed!"...

I wonder.
What's with the fingers crossed?
What are they itching for?
What dream are they pining for?
Why do they stand in the shape of 4?
What legs do they resemble...
Standing in indecision?
Or in contentment and pleasant inaction.

Are they 'crossed' at each other?
Or hugging in a calming gesture?

A gesture of hope when held up in air.
When you have given your all and it is time to wait.
Waiting for the best to manifest.
Wishing you know what is best.
Or not caring anymore in innocence
The crafty fingers are quiet for once.

When they rest behind a back...
Why do they become deception?
What truth are they waiting for
Or a lie they are standing for?
What's with the 'fingers crossed'?
I wonder.