DISCLAIMER: Below are some close personal views I believe are true, do not think I am preaching or forcing my opinion.
See, the problem within religious context is that people in the church (I don't call them Christians b/c going to church doesn't make you a Christian as much as going to a garage makes you a car...) focus on the rules of right and wrong. Don't get me wrong, there are things you should and shouldn't do, but that's completely off the point of what Jesus came to say. I try not to "sin" (sin is any wrong doing in God's eyes, for those less versed in TEH RELIJIUS LANGUAGE) not because I'm not allowed, but because I love God and I know it hurts Him (just like it's hurts your parents when they see you doing something that (can) hurt you). So, my life isnt' built around laws, but around serving Jesus because I want to, not because I have to.
With that stated, when people look at their beliefs as a sort of "rule book", they then try to shelter or abstain from things that can even tempt them to do it. For instance, most churches teach to not drink, because the Bible says don't get drunk. Some people won't watch R-rated movies, because they don't want the "world" to influence them. Well, if they feel that way, and it's the only way they can keep from sinning, good for them. But, stop throwing the baby out with the bathwater (to use and old, old saying). People are afraid of nudity, because they're afraid to be tempted. That's stupid. MY God is bigger than any temptation, or the entity which is trying to tempt me. So to say that I'm afraid to deal with these issues because of there power over me, is to say that Jesus isn't strong enough to protect me. I'm not saying I'm going to go to a strip club and expect God to protect me from lusting over what I see... I'm smart enough not to go to a strip club. But, if I see a nude person, I'm not going to go "OH LORD, I'VE BEEN TEMPTING TO CHEAT ON MY WIFE". I'm going to be more curious as to why a naked person is running around...
The other perspective churches take is the "appearance" of it (my least favorite). "Oh my goodness, if people saw you at a bar, what would they think!" Well, maybe I was at a bar because a friend of mine lost his job, is drinking his cares away, and needs my help. The Bible says to not be a stumbling block to other believers, so if there is something you do that may cause another Christian to stumble, don't do it. For that reason, I don't promote any non Christian music, or smoke, or drink at all, because I don't want my students to think it's okay to smoke or get drunk, nor do I want them to think because I like the way Marilyn Manson sounds I agree with what he says. I don't teach them it's wrong, I just tell them the facts of what God's Word says, and let them decide. But, I have 2 gauge earrings, and some people hate it. They think it's sacreligious (blasphemous even). Does that mean I'm going to take them out? No, they have they own personal preferences, and need to see past their judgements. The Bible also states "Do not judge others". So people have this issue of nudity because they feel it might cause other people to lust. Most people's outcry against it is not because they want to protect their children, or they want to keep it moral. It's mostly because they are afraid they can't handle it themselves. Kinda like people who tell others not to drink, because they'll just go out and get drunk all the time. Just because you are not strong enough to deal with that temptation, don't judge others because they can control themsleves without being tempted.
EDIT: Evil typos and spelling. SOme clarification