I have a female neighbor who's said that exact thing to me: "I don't believe in guns." She's divorced and lives alone with her 11 year-old son. I probed a bit and asked her what she meant. After a bit she said that she didn't believe that private citizens had a need for guns. After a bit more discussion, she has indicated that she's willing to go to the range with me and my wife. Hopefully, we can help her see that, while the Tooth Fairy doesn't exist, a private citizen's right and need to own a gun does.