I have not said anywhere that we should not permit parents to do anything! Where did I said parents should be banned from anything?
You say both things. First, as you stated, you do say that the biology aspect should be taught in school, and the morality aspect taught by parents. We agree on that.
Then you go further and state what a parent ought properly to believe and therefore teach to their child. You state a premise as if it is a fact, then draw a conclusion based on that premise. I am saying that I disagree with your premise (that a parent ought to want to teach their child about all aspects of sexuality) and therefore I disagree with your conclusion.
Where we seem to be getting at loggerheads is that you still think your premise (that teaching all aspects of sexuality is part of creating a well-rounded adult) is a universal truth, and I do not think it is.
Of course I would want a child of mine to be a good, intelligent, open-minded, thoughtful, wonderful and well-rounded person. However, I don't think that teaching them all aspects of sexuality, and particularly that various forms of sex are OK, is part of that.
I don't think that teaching children that it is OK to experiment with sex when I have told them NO is OK, either. Therefore, I find myself not in alignment with raising what you have described as a 'well-rounded' adult. If that is your definition, then no, I do not want a child of mine to be that.
If we were having this discussion about driver's education, it would not seem so difficult. The school may teach driver's education, but they do not either condone nor encourage driving without a parent's permission. They don't slip the kid a driver's license and a rental car and suggest they take it out for a spin if that's what they really want to do, no matter what the parents want.
A parent may likewise allow or disallow their child from driving as they wish, and none dare gainsay their right or insist that their child will not grow up to be 'well-rounded' if they are not permitted to drive.
Yet let the parent ban sexual activity instead of driving a car, and suddenly that's just not OK for the parent to do. Suddenly it is all about society's right to insist that the child be given a 'well-rounded' education, to include sexual activity if they so desire, despite parent's objections or even laws against it.
And by the way, I'm not angry. Many people think I must be furious and slamming the keyboard and stomping around muttering to myself or something. I'm enjoying some bottled water on a nice spring day, and I'm about to step out to do my laundry and get a bit to eat. I feel great, I'm happy, hope you are too. I guess my words are so direct that people imagine I'm furious when I write them. Sorry!