In “Dear Dad, Again,” Hawkeye recounts to his father the $50 bet he made with Trapper that he could walk to the Mess Tent from the Swamp and order lunch stark naked and nobody would notice. Strategically placed objects are used to great comic effect to cover up Alda, including the Sign Post and a piece of wood being carried by two men.
Although the camera work does a good job of making it appear that Alan Alda is only wearing his army boots and hat, thanks to the magic of the freeze frame option on the DVDs, it’s obvious Alda is wearing shorts. In fact, it appears that he has two different pairs of shorts on, olive drab ones and a white (or flesh-colored) pair:
I’m curious why two different pairs of shorts were used during filming of this scene.