The best 'sex education' I got was in second year juniors! The kids were'nt embarrassed the teachers weren't embarrassed. We all found it very interesting. I remember learning that when a man and a lady 'make love' - at this point we illustrated our work with generally ananomically accurate drawings of nudey men and ladies lying together, cuddling or something :-) - then the lady grows a baby in her tummy. Can't remember the precise details about what it was the man was supposed to put into the lady, or where... In fact I don't think I've quite figured out the 'correct' procedures regarding that particular bit, yet myself. Which isn't helped much, by the fact that they seem to want to put it in allkinds of funny places!

Seriously though, my best friend at school was having sex at twelve with an eighteen year old boy. She was quite a sporty, confident girl. It all seemed like nothing much to me, back then, though now of course, I might see things somewhat differently...
And while she didn't get pregnant, I do recall another girl leaving school around age fourteen to have a child.