One of the best things I ever did as a mother was make my pre-teen daughter attend the Unitarian Universalist sexuality course: Our Whole Lives. Also, telling her that her body is her own: I would not police it, and no one else should, either. That she should have sex when she wanted to, not to please a boyfriend or keep up with a girlfriend, but for herself. Also, of course, giving her all the info. she needed to protect herself from pregnancy and disease. Being a girl is so hard. Girls need more power, and we have to give it to them if we want things to change.