How can I talk to my husband about media violence?

Posted under Ask the Mediatrician.

Q: I have 8- and 10-year-old daughters and a 6-year-old step-son. My new husband thinks that PG-13 movies and violent video games are fine for all of our children, even his 6-year-old. But I never let my daughters use violent media because as a school counselor, I am well aware of the dangers of media violence for children. How can I educate my husband on this issue?