I think this is just a myth.
Perhaps a parable although to what end I'm sure I don't know.
An aside: My grandfather was blind and he had the coolest braille watch! He also had this odd little Japanese talking clock that had a very cute voice. "It. is. now. twelve. forty. five. - please hurry!" I loved hearing that thing when I went to visit!
Sorry I know this has nothing to do with your question, but It was nice to remember.