"Rank & Tradition"

A young Ensign approaches the crusty old Chief and asked about the origin of the commissioned officer insignias.

The Chief replied …

"It's history and tradition ... First we give you a gold bar representing that you are very valuable and also malleable. The silver bar also represents significant value, but is less malleable. When you make Lieutenant, your value doubles, hence the two silver bars. As a full bird Captain you soar over military masses, hence the eagle. As an Admiral, you are, obviously, a star. Does that answer your question?"

"Yes," said the Ensign, "but what about Commanders and Lieutenant Commanders?"

"That goes waaaay back in history ... to the Garden of Eden even. You see we've always covered our pricks with leaves."