An Ensign reports to his first duty station, and the senior Chief, after detailing his duties, asks the Ensign if he has any question about ranks and insignia, as failure to salute officers can "deep-six" a career. The Ensign asks him about the color and shape of the Officer's insignia, as this was not covered apparently in his 4 years at Annapolis. "Sonny, silver is the senior service color, you have a "butter bar", when and if you become a Lt. jg, the bar is silver-the bar is shaped like the step on a ladder, so a full Lt. has 2 silver bars, moving you two steps up the ladder of promotion. The two next ranks have the oak leaves, Lt. Cmdr. in gold, Cmdr. in silver." "Chief," the Ensign interrupts- where did that concept come from?" "Well, that's from the Bible, Sonny!" "The Bible?" replied the Ensign. "That's right, the Biblical story of The Garden of Eden," said the Chief-- In that story, oak leaves were used to cover Adam's prick, and the legend was passed down to our Middle-ranking officers, and still continues today!"