Note: do not read ahead if you are vaguely squeamish, or are male
The document is the only reason I found this thread, and also suggests sticking a long thin tube (eg, fishing line) inside your...
Well, I get the feeling I'm going to be getting nightmares about this, so I'll just say it reaches your bladder.
Shiver.
An, apparently, this causes prostate cancer. I have no clue how. Nor do I want to know.