Proper age?

These days there is so much information and literature available explaining how to discuss sex and anatomy with children of just about any age. Without sounding like a pedophile, pervert or weirdo, I think it's appropriate to start discussing these subjects as soon as they start inquiring about them. Granted, you should probably avoid the subject of actual sex acts until later, but we should stop filling children's heads with lies, myths, fairy tales and religious propaganda about anatomy and sex general. I'm sure that I'm not the only child that had to live through the guilt and shame of masturbating because of what I was taught!!!!