Maybe to keep the sails from tearing up if they hit the lines? Or perhaps keep the noise down on wind blowing through the rigging? I used to know at one time or another…
(eta: I think that) The little boy, grown up, was known as Commodore Thompkins in the SF Bay Area. He was featured in Brion Toss’ 1980s PBS series Sail Away.
Care to comment, B ?
eta: It was Robby Doyle’s show, not Brion’s. B supplied the seaman’s input for the series.