Sign of the times: "'The biggest challenge was to get extras who were skinny but who were not working out all the time,' producer and screenwriter James Schamus said to reporters... 'And who still had pubic hair.'" [WaPo]
I think people are focusing too much on the skinny. I think he means most of all: people who don't work out all the time. The fitness craze didn't start until the 80s, so he's looking for historically correct soft bodies.
Like mine. Which is historically uncorrect for these times.