What IS good, and how do we determine it?

[abaris]

The Church does not teach "hey kids, go have sex before marriage, but don't use condoms!". The Church teaches "Hey kids, don't have sex until marriage." (They should, of course go a lot more into detail than that when speaking to kids, but you get my point).

You're adressing first world problems here. Even looking at it from that perspective, kids being kids and having needs won't heed the advice.

But it's developing countries and the Third world where it really gets harmful. Aids is rampant in certain parts of Africa and so it spreads even more, since condoms aren't used and humans being humans don't get abstinent all over sudden. At the same time overpopulation in regions where they don't have enough water or food is getting a real problem. Having many kids is part of the culture and without educating the people on contraception it only worsens the problem. It also leads to women being pregnant year after year, thereby endangering the lives of these already malnutritioned persons.