Oh for [PROFOUNDLY OFFENSIVE AND LENGTHY STRING OF EXPLETIVES].
It's things like this that make me glad that I'm living in Sweden and not the US. I mean, seriously. What are these parents thinking? I'm 18, I'm not having kids for a while yet, but I can not see one single logical, compelling reason a responsible parent would act like this. "Oh, but my little baby would surely be ruined for life if condoms or STD's are mentioned in his/her presence! Nope, I'd rather keep them in the dark about it, then ***** and moan about proper steps not being taken when they're pissing blood!"
I don't know about the last part, but it seems the next logical step for these people. The kind of people I'm talking about (not unique to the US, by the way) who have this notion that their children are perfect, pure, incorruptible little angels.
Here's a hint: THEY'RE NOT. I sure as hell weren't, and neither are your kids. Children are curious. That's a well established fact. Sexually explicit material is widely available EVERYWHERE, and no matter how much you try to shield your kids from it they will be exposed to it sooner or later. If they don't find something on the internet, it will be from a "cool older friend" or another kid who's managed to steal one of his dad's poorly hidden porn magazines. To quote every mad scientist ever, the possibilities are endless.
However, the sad truth is that most parents who have these opinions won't listen. They didn't grow up in an age where this material is so widely avaiable, and they have different moral values. To them, the world is frightening and unfamiliar, so different from the supposed paradise they grew up in (though to be perfectly honest, they were probably exposed to sexual things at a young age too; they just either don't remember or don't talk about it because people were much less open and accepting about it back then). This leads to contempt for society and culture at large, and thus we get scared parents who throw bitchfits because their children can't grow up in the pure, wholesome and above all "safe" world they did. A world which, by all venues of logical thinking, have not, does not, never will and practically CANNOT exist. And yet they rage.
So what's the solution? I don't know. Talking to them is useless. I'm open for suggestions, but for now I'd say to just ignore them. Including their children. Yes, I'm talking to you, kids: do not listen to your parents when they say stupid shit like this. You don't deserve to have your lifespan shortened just because your parents refused to let someone teach you how to put a piece of elastic rubber on your dong. The advice about not touching hot plates is gravy, though. Memorize it.
Aaaand that's my rant.
EDIT: Another tip. Don't bone people before your voice has dropped a few octaves.