Even without stealth Hitlers lurking around, it's still important not to blab about the war effort, because you never know who might be a spy.
Gender equality wasn't such a hot issue in the '40s, and so it was deemed necessary to inform the population that women are not, in fact, inanimate objects and can not only understand what you're saying, but, under certain circumstances, even repeat it. There were a few other "Keep mum -- she's not so dumb!" posters produced in the U.K. ...
Via Wikimedia Commons
"Tell ya what. You go make papa a sandwich, and I'll tolerate your crying and rambling bullshit tonight."
... and naturally, they all depicted blondes. Also, note that the word "so" isn't strictly necessary to the wordplay, they just threw it in there so women didn't think this was a compliment or something.
Jacopo would like to thank @LisaAJK, @TerryMoran, @Timelady07 and everyone else kind enough to follow him on Twitter. Also, thanks to Prof. John Brown of Georgetown University for blogging about Jacopo's previous article on propaganda posters.
For more ridiculous feats in art, check out Lost In Translation: 20 Baffling Foreign Movie Posters and The 8 Manliest Foreign Movie Posters Ever.
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