Unfortunately the thread has since been removed, but a friend of mine belonged to a message board for trucks and SUVs. One of the men on the board posted about how he was putting down a new lining in his truck bed. Feeling the need to pee, he didn't think about the stuff that was still on his hands, stuff that wasn't fully try yet.
He ended up going to the hospital to get the stuff removed, he was firmly convinced he um, inadverntantly castrating himself. Fortunately the doctors were able to get the stuff off, but he was in pain for quite some time.