When I did my sailing trip, some of the trainee crew had the task before we left of coating all the eggs in Vaseline so they would keep longer. (It’s also possible that the experienced crew was playing a bit of a practical joke.)
Did they offer to show you the golden rivet?
No, but there were a few similar moments on board.
My Navy friends and I were laughing about that kind of thing in the USS Nimitz’s bowling alley just the other day.