Hey, I was a teenager once and I know what goes on. If I lock her away I don't have to worry about this stuff.
Let us know how that works out...
I you have been a normal teenager you probably know that there is always a way if there is the will to do it...
Young people have to learn how to deal with their sexuality in a responsible way. It is quite normal to me that 16 year old teenagers start dating i.e.. That doesn't mean they they should do any porn-tapes or other weird stuff.