Parents aren't doing their jobs teaching their children how to prevent pregnancy. Just telling teenagers to not have sex doesn't solve the issue. Some listen, but others don't.
We should be teaching students how to use a condom. We should be teaching students about STDs and the long term impacts they can have on your body. We should be teaching students how to have safe sex.
Putting your head in the sand is not going to solve the issue. This is about promoting public health. We as a society need to stop being so puritan when it comes to sex.