Wow, you're an amazing mom. I grew up thinking that it was a horrible sin, and that God wouldn't love me if I maturbated. But I couldn't help it. Even now, I feel dirty when I self satisfy.
I've never had to deal with that subject with my own kids. We are a very open family, my kids talk to me all the time about sex and anything else that crosses their minds. But this subject has never come up. My youngest are now 16, and we talk openly about the fact that they both feel they are bi-sexual. Guess it runs in the family, so am I. We've discussed in length the differences in relationships. I feel great that they feel they can come to me.