I respectfully disagree.
A. Sex is a perfectly healthy habit for adults to have. The whole sex-shaming, making it taboo, secretive, and blushing when talking about sex isn't productive to society. People that have sex more often are healthier and happier than people who don't. There's no shame in that.
B. Cutting people off from a perfectly natural human instinct isn't productive and can lead to sexual dysfunction more than providing a healthy environment for somebody to learn in.
e.g. Nobody has ever gotten pregnant, caught an STD, or went to jail for masturbating to pornography at an appropriate time in an appropriate place.
So if you're going to raise your children and tell them they can't touch their own bodies for any kind of sexual stimulation until they're married...
you are the naive one. I don't see that as healthy for an adolescent.
C. Sex with other people prior to marriage is going to happen.
Very few people... especially now... as people are shifting towards waiting until their 30's to get married, are going to be virgins are their wedding. You can hold the moral wand of encouragement and wave it around all you want, but it's unrealistic. Instead, it should certainly be encouraged to use protection at all times and if your daughter is sexually active, get her on birth control until she's old enough to take care of a child. Otherwise, you're just encouraging her to go behind your back without the tools she needs to avoid a bad outcome.
That being said, if my daughter approaches me at 13 and asks for birth control, I'm going to lock her in a basement for a while.
D. As for unrealistic expectations for sex formed through pornography... it's much more like the action movie than the New York apartment. Of course, it's fantastical and overblown, just like anything else you see on TV (even the "reality shows"). At the same time, it gives you a safe way to explore things you might be into and find a like-minded partner that's into the same things. I guess if you get into something super-weird that you can't even approach your partner with, and that's the only thing that does if for you, then that's an issue... but it's just like anything else in life...
Everything's OK in moderation.
I'm not gonna tell people how to raise their kids... that's your own business... and you guys can be prudes or hypocritical or whatever... your own business.
I'd prefer my daughter to be able to have an honest conversation with me about anything she comes across in life so I can guide her in the right direction when the time comes. Most kids are going to do what they're going to do anyway... might as well be there for them instead of pretending its a perfect world and sex/drugs don't happen in it.
Luckily I have a long way to go before I have to worry about these things.. and my opinion is fluid and could certainly change by the time that comes around.
.....
Typing this all out did make me want to go ahead and finish my basement though