Fortunato - is there any way that you can move your computer to an area where it can be seen by you when someone else is using it (e.g. corner of the living room)? That way if they do come across something they know you won't like then they're less likely to keep it up on the screen. But they could well come across this stuff outside of the home, be it on the Internet, TV, magazines whatever. It's certainly not for anyone but you to decide how you raise your children, and I hope you're able to sort this out. I don't have children of my own yet, but I do take youth groups of varying ages and it seems that information gets to kids in one way or another (word of mouth from other youngsters causing all manner of intrigue and misinformation), so I think everyone's on the right track when they discuss the issues with the children themselves.