There's a good piece in the New Yorker about Robin Williams and he talks about his five tours entertaining the soldiers in Baghdad. One of the things he enjoyed is that he can work as blue as he wants there; the soldiers don't mind naughty language.
Reminds me of a very old story. My father was an educator and his beloved mentor was Colonel H. Edmund Bullis. Among many other things, Bullis served under General George Patton during World War II. When the movie Patton came out my father was shocked by the profanity. He asked Bullis if it were true to life. "Oh no," said the Colonel. "Patton was much worse."