If they can't handle those kinds of scenes at an early age what makes you think they can handle it later on? You can't censor "life." Although "it doesn't seem right", what is so wrong with it? I think you're doing your kid a disservice by keeping them from watching movies that could put their lives in a different perspective just because they are immodest scenes that society has portrayed as something that is impure.
What do you consider "an early age"? I mean, seriously, would you really think that because a 16 or 17 year old could handle a sex scene, does that mean that they could have or should have been exposed to it when they were 5? You don't need to censor life. It's just that there are certain things that are appropriate for older children that just aren't appropriate for younger children, no matter what.
I'm not saying you should throw your kids in front of *bleep*. But, by the time they decide to watch movies or change the channel I think they can figure out what to watch. I saw plenty when I was a kid and it didn't screw me over as it supposedly should. Sure I've seen a few things that I regret like Chucky, It, etc. but they didn't do more than scare me and teach me that I'm not interested in Scary movies. As for actual movies that had sex scenes in them, which I saw, didn't do much because I can't remember anything specific. As for being inappropriate my question is why is it inappropriate for say... a 10 year old to not see a little bit of intimacy and not a 16 year old. Age? Maturity? I think by now we can say that age doesn't always bring wisdom and maturity doesn't come unless they're world has been expanded.
First off, my 6 year old "knows" what she "wants" to watch, but that doesn't mean she will be allowed to watch it. Secondly, she is old enough to know how to work a remote and to change the channel by hand, but that doesn't mean that she should be able to "figure out" what to watch. She is not old enough to make those types of decisions for herself yet. That's why children have parents. It is our job and up to us as responsible parents and adults to pay attention to the types of trash that our children are being exposed to on tv and in the world.
Also, you ask why a 10 year old shouldn't see intimacy but a 16 year old can. Why can an 18 year old vote and not a 16 year old? Why be 21 to drink alcohol, but not 10? I guess age does bring a little maturity into the picture somewhat.