Putting all my biases aside for the moment,WHAT can possibly be gained from doing this?
After all,children up to around age 12 or so have no real interest in sex,and when they do get old enough to be interested,it doesn't take them long to figure out what fits where.
I do agree with teaching children how to protect themselves from sexual diseases once they are old enough to need this information,though. I remember when my mother "explained" sex to me. She was so embarrassed and so vague it took me a while to figure out she was even talking about sex,and if there is ONE thing a young boy does NOT want to discuss with his mother,it is sex.
And once you become old enough the hormones kick in,it doesn't take long for you to figure out the operational details.
What teens need education on these days is how to avoid sexual diseases,and how to recognize them and seek treatment if they become infected.