For those who know how conservative I am on most things, it'll be a shock when I give my opinion on this one... There is nothing criminal, in my opinion, about a 16 y.o. testosterone-charged boy getting some experience at the hands (or whatever parts of the anatomy ;-) ) of adult teachers. If it hadn't happened that way, there might have been simply more pregnant 16 y.o. girls at that school. I did not get so lucky, but I know others who did, and it did NOT do any damage... In fact they say it was a positive experience even decades later.
Charles