I think sex education in schools is of course an important subject, my convent school only taught it through reproduction in non human species, sex being an almost taboo subject in catholic schools back then and needless to say only took place within a marriage that was about the extent of it. Of course there is no guarantee that all parents will impart vital facts to their children and in that the school should play an educational role.
Casting my mind back to the particular article I read in The ST, bearing in mind it was a few weeks ago now, I do remember one mother talking about her quite sensitive 12 year old girl who was asked to put a condom on a banana in front of several sniggering boys, which left her not wanting to go to school after that. There absolutely should be a veto available to the pupil in refusing such a request imo, 12 is still very young an age and there will be a great disparity as to development both physically and mentally insomuch as to how any individual will process what is under discussion, or may not even want to hear about some practices, I had no idea what anal sex was in my early teens and I know that is something I would have found horrifying. Parents will in most cases know their own child best. In fact casting my mind back to my own children's senior school years, sometimes we, the parents, were invited to a meeting when subjects such as drugs were going to be brought up in PSE so there was some sort of consensus as to maybe what was being discussed in the home didn't contradict, what they, the school, proposed to bring up mainly regarding skunk which seemed to be a relatively new phenomenon at the time.
I definitely think attitudes towards the opposite sex and respecting individual rights and paramount. Boys are subject to very toxic influences these days such as that Andrew Tate guy who has a very pernicious effect, from what we read, on the adolescent male. I think girls need to be taught not to allow themselves to be pawns, I read somewhere many will have been coerced into performing a bj before a first kiss, not a great introduction to sex, not wishing to come over all Jane Austen, but I think we, our generation, at least were possibly lucky enough to experience some romance as a preamble to sex.