Lest this discussion devolve into "lel, US so prude": Outdated sex ed exists or at least existed in Germany as well. Which is why over the past years several federal states have updated theirs (sometimes much to the chagrin of reactionaries who don't like that e.g. homosexuality is included in the curriculum).

When I went to school in the 90s, sex ed at my school was "penis in vagina, then pregnancy" plus contraception. No mention of consent, erogenous zones, social pressure, different sex positions, homosexuality etc. or even the simple fact that sex, when done correctly, feels good.

A few years later though there was a lecture by a doctor of a local hospital about AIDS, which was much more in-depth: I recall us listening, rapt in our attention, when he showed us various sex position on the overhead projector and then asked about the risk of infection with HIV (we were wrong most of the time). He was laid back, knowledgeable and funny.