A lot of older pregnancy awareness campaigns were all about abstinence in the USA. It is only recently that people have realized it doesn't work and things have been changing to advocating condom use etc.
It's not "older", it's "Republican". There are still states that predominantly teach abstinence (looking at you, Texas, https://www.dshs.state.tx.us/abstain/), and any mention of contraceptives as both a means to reduce the risks of pregnancy, and of STDs, are mostly at the teacher's discretion, rather than a mandatory part of the course work.
