It was a surfing accident, though it involved neither saltwater nor neoprene.
I was searching the internet for comfortable underwear, something hard to find when you are hung, as many of you know. A Google search for "pouch underwear," along with a lot of astonishingly stupid-looking underwear ads, brought up one of the forums here on the subject.
I came, I saw, I joined and contributed. (Veni, vidi, vavavoom!)
I still need to find underwear I like, but my previously-unknown need to learn more about other hopelessly over-endowed men has been met beyond my wildest dreams.