The thing about kids learning from their peers/TV/internet is that you really cannot count on the other kids to be informed, or for the media to present it usefully. Sure, a few might be, but misinformation -spreads-. My area has abstinence-only sex ed (they even leave sex out of basic BIOLOGY, sperm + egg stuff gets taught with zero mention of things like how sperm GETS there) and the stuff I grew up hearing was just... I'm thankful I had the internet.

I grew up with a disturbing amount of peers believing you can't get pregnant the first time, or if you exercise after and do jumping jacks. They will learn about sex, yes. They may well never be taught about SAFE sex. It needs to be taught.