http://www.theatlantic.com/magazine/arc ... core/8327/
As recently as 15 years ago, if somebody wanted vivid depictions of, say, two men simultaneously performing anal penetration on the same woman, securing such a delicacy would require substantial effort because the pornographic repertoire was still limited by the costs and imprecision of distribution.
...in a moment of exasperation, he asked if we could have anal sex. I asked why, seeing as how any straight man who has had experience with anal sex knows that it’s a big production and usually has a lot of false starts and abrupt stops. He answered, almost without thought, “Because that’s the only thing that will make you uncomfortable.” This was, perhaps, the greatest moment of sexual honesty I’ve ever experienced—and without hesitation, I complied. This encounter proves an unpleasant fact that does not fit the feminist script on sexuality: pleasure and displeasure wrap around each other like two snakes.