I have a new favorite "channel" on Youtube. Blimey Cow is the brainchild of three young adults: Jordan, Josh, and Kelly. Their stuff is fresh, insightful, and usually very funny. From what I can gather in their videos, they are committed to pointing out (and satirizing) much of the goofy and backward things in our Christian sub-culture.
What they do very well is point out the troubling ways that the world has influenced our thinking in the church, particularly as it relates to teenagers and young adults. I encourage you to visit their site and poke around a bit. They will make you laugh AND think.
Here's a great video about sex that would be worthwhile viewing for every teenager. Pray that God gives you a creative way to get your kids to watch it...