I really wish sex ed programs would actually educate instead of beating around the bush. When I lived in Florida, my county had a reported 25% of 8th graders who had been sexually intimate. Showing them how to have safer sex is far more important than "protecting" them from seeing a representation of a penis. Ugh, even when I had my freshmen orientation in undergrad the speaker used a banana. The truth is that many people don't use condoms correctly (or at all, sometimes) and onus is on a proper sex ed program to change this. Unfortunately, a combination of irresponsible parents and school administrators (and some presidential directives) have denied many individuals the knowledge the deserve to keep themselves safe.
Argh, it just makes me angry. You can't stop teenagers from being sexual; you can, however, provide them the resources they need and the answers to the questions they're afraid to ask in hopes that at least one of the two individuals involved intimately demands that such intimacy is carried out in the safest manner possible.