God you must read The Sun!
Its not teaching 5 years how to shag or how a baby is formed.
Its EDUCATING children on the BASIC differences between boys and girls. And whats un-acceptable behaviour!
And FWIW I was first taught Sex Ed when I was 10 or 11. Some awful cartoon video. "When the man rubs his penis..."

Put me right off sex for the next 40 years!
Dont think anyone I knew that age got pregnant. But conversely its not going to stop some slapper at 14 taking on half her mates.