Superhero movies are usually a PG-13 safe haven for families or for parents who send their kids to the movies so they can have a few hours of peace and quiet. They're full of violence, but it's usually the bloodless sort, and while there are occasional instances of foul language, studio superhero blockbusters are decidedly unsexy in spite of skin-tight uniforms and the occasional shot of a shirtless Chris Hemsworth (Thor) or Henry Cavill (Superman).

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