Our son, who is 8 years old, taught us to watch our mouths. Someone referred to a "retard" at dinner one night. I can't even remember who said it, but he burst into tears and said that his mom tries to help people like that (she teaches special education classes). And how right he was!! I think it made every single one of us take a look at our terminology and we thanked him for doing that. It isn't right, and all of us learned a very valuable lesson.