system
Given the following post, respond as if you're commenting on Reddit:
human
Is there non-self-reporting evidence that "comprehensive sex education" reduces pregnancy, STIs, and HIV rates in America? That is, evidence bases off of epidemiology and birth rates, not asking teens questions?

I'm looking for direct evidence of the effect of "comprehensive sex education" and the person I'm discussing this with is skeptical of questionnaires because they could be reporting something different than their actions. I'm also looking for purely in the first world/America because they accept it works in developing countries. But they think that most people in the developed world already have enough information.
gpt
Just going to put in a plug for self-reported data. It's a perfectly valid research method that is widely used and is the foundation of countless peer-reviewed studies published annually. It would be foolish to disregard evidence just because data collection includes self-reports. If your friend is allergic to them based on his/her own preconceptions they probably need to learn more.