Back in the day, I saw a BDSM magazine in Houston that featured ball piercing. I don't have the guts to even consider this, but the concept (or the fact that someone would actually do it) was interesting. The scrotum and testicle were pierced with a long silver needle.
I have had my nipples pierced at the base of the nipple with similar needles, just not as long.
I was also told by a Madam at a place I frequented that she had an airline pilot client whom claimed to have flown with one of his nuts skewed. That, of course, was just a statement.
The thing I remember about this lady was that she had the first video I had seen (seen a couple more, since) where a lady demonstrated tying her labia in a knot. The lady in the video said: "I'm long, too".