How many boats in any given marina actually sail naked? Some, but probably only a very few. I'm guessing that about the same proportion have already expressed themselves here, with maybe one or two more finding it unnecessary to be public about it.
As I said in a very early reply here, clothing did not originally evolve from modesty. It was for protection and that still applies. I just can't imagine the logic of carrying a knife while sailing, but not wearing pants.