Here is a great book to help families talk about the sometimes touchy subject of pornography.
It uses the analogy of a wasp trap to illustrate. It is a great way to open up a dialogue with any age kids. I pull out my copy every so often and we talk about things. We tell our kids to come to us and we will always tell them the truth and help them in any way they need. We share our values and what we expect of them at this time. We share what pornography does to our minds and our spirits. How it can affect relationships in the future. I hope this helps you talk to your kids about a most important subject. There is a link to Amazon.com where you can buy the book above the picture.
Check out my other posts in the Family Section for more ideas on teaching your kids your values.