I disagree Mrrzy. I don't know what parents you are observing, but I don't think it is a fair comparison. This situation in Texas is not an example of the thinking of most Americans. I also think you are wrong to make an assumption that parents have to "intervene" when it comes to sex. Intervene and educate are two different items.   You have to observe more than a handful of instances that the media jump on to realize that most parents are more concerned about having their children develop the tools to make choices that they can live, or die with.   

We are not a mainstream Puritan society no matter what the media tries to display. Look around, you just have to observe wider examples.