Talk with your kids about sex
This video can be seen in primetime in most TV channels in the Netherlands. The text in the black boxes in the end of the video says:
Kids watch pen in the internet.
Talk with them about sex
Before they do it.
It doesn’t say “watch out and forbid them from using the computer” or “don’t let them in the computer alone” or any of the many other usual discourses that can be found else where.
It puts the emphasis in the right place. As a parent it’s your responsibility to talk with your kids about sex if you wasn’t to have any control over the message. And you should do it earlier, not later.