i think every country and every culture will give some effect and would be a factor in the puberty of some teenage.
by the way, at my country Indonesia. the age of puberty getting younger, actually its seem so normal if they start puberty at 14 or 16 years old.
but now, i can see that some boy at elementary school (8-9) by the way they act or talk its show that they have premature puberty, its so painfull too me exactly.
because i cant stand with they activity, its get worst when they start to do something that not allowed or beyond their ages.
1. start smoking, its true they suck that cigarette.
2. talking dirty, maybe they so confident using hard word or impolite
3. shout and yelling to the parents
4. have free access to porn site
5. drink some liquor
6. the top worst====> free sex and drugs using
its all true and my answer is answered by reading the news, observe the reality, and shared by some parents.
so, my conclusion is, now the puberty ages of boy never be still. its moving to more younger and younger trough the time.