So we should remove our focus on contraception then? Simply ignore it, yes?
Yes. Teach it like any other biology lesson, and treat it as a non-issue.
Higher instances of unwanted pregnancies compared to what? Exactly.
Practically every country in Europe.
America was the start point for sexual revolution around the world, there you have it.
You wouldn't be able to guess that looking at America now. It is way more sexually repressed than most of Europe. So, compare the sexually repressed America to the much more sexually liberal Europe, and you'll clearly see that more repression here has resulted in more sexual problems.
Drinking age is completely different issue. Why do you think lowering the age will lower poisoning count? Do those teens buy black market low quality stuff because they cannot buy in shops? No. They buy same stuff as you from same shops. If you open the gates, there will be same if not bigger amount of poisonings, cause restrains might keep some 2% at bay.
If that were true, you'd think that drinking problems were higher in countries where drinking age is lower, or more like guideline than a law, but the contrary is true. Why? Same reason sex, drugs, and guns are a problem here: we try to repress them, and end up with the "forbidden fruit" problem. It's easy for kids to get alcohol in Italy, so they don't care about it, and prefer things like gelato. It's hard to get alcohol here, so kids actively seek it out, just because they can't normally get it, and it's considered cool to get what others can't.