An often overlooked and under appreciated point:
Many popular sex abuse prevention programs focus on teaching kids about "good touch-bad touch", but the words of one adult survivor of sexual abuse must be heard: "No one ever tells a child that a wrong touch might actually feel good!" In fact, molesters often count on a child not knowing this critical fact of life, and use a child's physical response to convince him or her that they were a willing participant.
Comfort, knowledge and language about the sexual parts of the body are crucial to the foundation of sexual health and safety for our kids. Children with knowledge and language are less appealing to molesters, who seek out kids lacking the tools to speak up. Children who know the fundamental difference between healthy privacy ("I can do it without Mom or Dad watching") and secrecy ("Mom and Dad can't know about this") are less likely to be sworn to the silence that provides cover to people who sexually abuse children.