Let's face it: Sex education in America is ... lacking.
Best-case scenario, you'll get a hyperdetailed biology lesson interspersed with some anxiety-inducing descriptions of nightmarish STIs. Or you might hear about all the ways unplanned pregnancies will ruin your life so don't mess it up, kids. On the other end of the spectrum, there's "abstinence-only education," which hardly counts as educational.
For all the progress that we have made on sex and sexuality, it's still difficult for kids to figure out how to have sex beyond an overly-simplistic understanding of "in and out." The things they do learn are more likely to come from movies or ill-informed locker room banter than from a trusted adult.