in teh UK, sex education by schools is often a bit of too little too late, with most of it being aimed at 15-16 year olds, when at that point, usually the ones that are most at risk of such things have already been exposed to any number of half-truths, falsehoods and bad habits, regarding chances of conception, contraception methods, disease transmission, etc. "condoms make it less fun", "you can't get pregnant standing up", and so on.
Not helped by various outcrys from different groups. e.g. the Section 28 shenanigans a while back.
Or how the vaccination against that virus that causes cervical cancer, that was being given free to schoolgirls in Scotland, was being opposed because it would make the vaccinated girls promiscuous.
it is also complicated further in Scotland by the existence of the seperate schools for Roman Catholics, which have their own restrictions about what they are allowed to teach.
E.g. the non-denominational schools, they have these dolls that are fitted with various instrumentation. Pupils are given the doll to care for for a period of time, and the doll records things like how long it takes for it to be picked up when it starts crying, and various other things, like if people yell at it and stuff. Looking after it is quite hard work.
The RC schools were not allowed to run the doll program, due to objections from the priests.
Guess which schools have the higher pregnancy rates.