Its a problem that has a solution.. but its just a solution many would be uncomfortable with.
I live in China.. the problems of behavior out here, especially sexual are tiny compared to the UK.
I have run lectures and workshops on sexual related issues with university students, and the massive massive percentages of university students who are virgins when they attend university is shocking when you come from the UK.. but that's nothing compared to the huge numbers who have never even had a girlfriend/been in a relationship. Imagine all the whiney threads on here about virgins, but a country.
That said their rates of marriage and coupling up after 18 are very normal.. and except the in balance between the numbers of boys and girls, I cant see any long-term negatives to the lack of dating/sexual activities at a young age.
So how do they achieve this?
Simple: Curtail individual freedoms for the collective good.
For teenagers:
No porn. Its all blocked (nationwide) and is very hard to access anything remotely pornographic.
No dating in schools. Its against school policies, any sign of two students dating will result in punishment.
No phones. Bring your phone in, and youl be lucky to not have it destroyed in many schools
No freedom/free time. School is from 7-8am to 8-10pm for 16 year olds. Its their life, and outside time is very limmited and normally family based. most teenage girls in my town are very rarely allowed to go out for the whole day on their own.
Respect for teachers. Teachers are the gatekeepers of success, parents must respect their opinions, or their students futures could be negatively effected.
Unisex school uniform - its like baggy sports wear, nothing sexual at all about it.
Strict hair/make-up/jewelry code: E.g. no makeup at all. No jewelery at all. all boys must have short hair, all girls must have long hair tied back, or short hair.
etc. etc.
I fully expect any western individual (such as myself) to have problems with many of these.. but to be simple, in my experiance its a trade off:
You either take the bennifits of freedom for individual teenagers, whilst accepting this will lead to problems for some. Or you limit their freedoms, in an effort to limit the problems.
Its worth noting that having worked in both UK and Chinese schools, I wouldnt say either group of students is more or less happy.. its just a trade off between different problems. Uk students have far far more socially-related problems that cause unhappiness/mental health problems. Chiense students have far far more academic related problems that cause unhappiness/mental health problems