Huh... kind of reminds me of this chapter in the book
Crooked Little Vein where the main character has saline injected into his ballsack in order to find out what happened to the real Constitution of the United States. Upon further research (which I'm kind of regretting doing on my work computer), I stumbled across this article, which has a play-by-play synopsis of one person's experience.
Saline Injection Stories - BME: Body Modification Ezine