I carefully avoided passing a moral judgement on their acts. However the fact is sex at 16 immediately jumps into moral issues (not just Christian - most world religions encourage marriage). I did my best those to focus on the fact that as a result of that choice they have eliminated their ability to get a head.
YOU are the one placing moral judgement on their choices and trying to make it look like my judgement.
I don't buy for a second that being sexually active as a teenager somehow equates to lack of moral fortitude.
There's plenty of teenagers that are aware of birth control and use it appropriately. Do they lack moral fortitude, too?
Or put it another way, you cannot talk about kids having sex without everybody bringing their own different morals up. The two are very intertwined.