Nudity Isn't Illegal in National Parks, But Don't Do Anything Weird
Cursing and nudity : YellowstonePN
UPDATED: Nude Beach In Yellowstone National Park?
Nevertheless, the series remained on air for seven sex-filled seasons.
Another fairly contemporary mention would be Sin City 2: A Dame to Kill For 2014 where Eva Green plays a conniving seductress and has bared it all in many scenes.