Strangely, even though I strongly disagree with 80sU2isBest on the ideal of marriage, and think that belief in the biblical dictation of marriage ignores the historical precedent of marriage's corruption (which sours me on it but is not reason in itself to abandon belief in the religious value of the ceremony, I will conceed)...
I am inclined to agree, though, that seeing beauty and lust are connected in the mind, and you can control whether or not you feel lust. I would even go so far to say that the sexuality of nudity is entirely in the eye of the perceiver, and even the most overtly sexual nudity can be seen without striking up lusty passions in the person viewing it. This isn't denial, so much as state of mind. Nudity in art doesnt have to be seen as sexual, nudity on television, in magazines, or in real life; you really do choose how it affects you. We dont see things as they are, we see them as we are. If you see it as sexual, you're allowing it to provoke that from in you, but it's only really an issue when you allow it to provoke sexual feelings in you. So I guess, I sortof disagree in the sense that no ammount of nudity should be overpowering of your will, whether you look at it or look away. You can appreciate nudity like a scarlet sunset without doing anything illicit or wrong. There's so much beauty in the world, why should the human body, one of the most beautiful and ugly of all things be treated any differently? Everything is beautiful, and everything can be appreciated as beautiful on the same plane.
I had a problem a few weeks ago where I was at a party with my friends, and my friend's ex-girlfriend decided to get naked and strut around. My girlfriend wasn't there to witness it, but I still had to tell her what happened, simply out of principle. The thing is, though, I didn't see that nudity as being a sexual thing, or something that stoked the flames of passion or any such thing. The 'betrayal' or 'adultery' occurs in the mind, the act of allowing someone other than the one you love to enter your thoughts in the one way reserved expressly for the one you love. Of course, I think anyone might agree that this is a 'betrayal' in some purely philosophical way, but I think many will argue that you can see something arousing without forcing the love of your partner out of your heart in lieu of this momentary indulgence. I don't think the simple 'seeing of nudity' equates to betrayal, there needs to be some sort of action on behalf of the perceiver, whether that's allowing lusty feelings, or worse still, allowing lusty feelings to dictate physical actions.
The argument can be made, I think some will agree, that once you make it acceptable to admit these lusty feelings into your mind, that the 'foot is in the door' so to speak that might slowly force lust into your hearts in more increasing 'severity' if it can be measured in such a way. I don't really agree with that, myself, but a lot of people think that 'slippery slope' is the end-all of causality-related theories. What it comes down to is whether your love is more important to you than feelings of lust, and most people have the strength in their love to force that door closed as soon as it's opened without allowing any sort of transgression to occur. You can choose where to draw the line before you slide all the way to the bottom with things like this. Where I turned away and stared into the night whenever not talking to one of my friends on the night I mentioned earlier, one of my friends went so far as to cop a consentual feel of the naked lady despite having a girlfriend. He didn't draw that line, he let himself be won over by his passions in a clearly unacceptable manner. Maybe if you're single, this is okay, but if you're not... well, yeah. Of course, having known him for 7 years, his actions didn't suprise me at all, and it certainly doesn't suprise me that he's still with his girlfriend because he only told her about the nudity and not the groping. But, you know, what happens in other peoples lives is their business.