What a good teacher to look after her students like that. I guess it goes to show how much times have changed. In my parent's day premarital sex would have been a no-no, but when I was a young man back in the early 00s, sex-ed still encouraged abstinence but the teachers did try to inform us about contraceptive methods and avoiding STDs. Nowadays it's just like "We know teenagers will fuck, the most important thing is that they stay safe while doing so." Interesting way of seeing social change through the lens of manga.