I guess I disagree.....each person is different and can be tempted more easier in different situations. I know that I can walk into a casino and not spend a penny and not even flinch. If I walk into a buffet resteraunt, I will prolly fail. But that might not be to the next person. I think when it comes to situations and things like that, you can sit there and not even think twice, but the person next to you could go beyond in their head till it turns into a sin.
I belive the Bible talks about walking away from temptation, so like with me, I don't go to resteraunts where I know Im setting myself up for failure. I stay away from them and other things that I may or may not even fail in.
I think you answered your own questions, and well might I add.
My mother is a gynecologist and my father is a chiropractor. They taught me that a body, in and of itself, is not a "bad thing" to see. It's the context over the content. Obviously no one would argue against what either of my parents do because they understand the context.
Having said that, in movies, some people are incapable of looking at the content within the right context. They have a hyper-sensitivity to scenes, be it to violence, language, or nudity. Both of my parents can watch discovery health where they do intensely graphic surgeries and they don't flinch at all. They could eat medium rare steak whilst doing it too. I, on the other hand, get really sick. However, if someone uses the "f word" in an attacking way, my mother gasps as if she was shot in the chest by a 12 gauge. She claims it hurts her spirit. Other people can go to sleep listening to the first scene of Full Metal Jacket (ultra vulgar) and they sleep like a baby.
If someone feels convicted by the Spirit that they ought not to watch, it's probably best you not watch.