strix9.jpg is my favorite. Her ass is exposed to the world. And the depressed area of her right ass cheek is a nice added touch.
I think I know why being crucified, especially when nude, would be humiliating. All of your scars, bruises, whip marks, and every other feature of your body is open for inspection. Your muscles are seen performing the "dance" in all its glory. Instead of being private, your pissing and shitting, and even your farting and getting penetrated by corni, is a public performance. You are open to ridicule, abuse, and other bad stuff. In other words, crucifixion is the victim being exposed to the world until death takes the person away, and even then the body is still seen.