How about instead of having it balled up, have it stretched out and come up your back with the head resting on your shoulder (just a thought.) I have a design in my head where a pair of my boas would come up my back and have their heads resting on each shoulder. I've included a pic but to be honest with you, I don't remember exactly what the pic is. I'm typing this before I hit the preview button but I figured I'd include a pic anyway. The key element here is getting a top-notch tattoo artist to draw this up. Quality is where it's at with tattoos, IMHO. Good luck and when you get it done, post a pic. I'd like to see it. Take care, Scott Sullivan.
P.s. After looking at the pic, it won't really be a good tattoo pic. I took the pic for a size comparison for someone.

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Injustice anywhere is a threat to justice everywhere.
Martin Luther King, Jr.
"In any civilized society, it is every citizen's responsibility to obey just laws.
But at the same time, it is every citizen's responsibility to disobey unjust laws."
—Martin Luther King Jr