I know several evangelical parents who want their kids ignorant about sexual health because they think teaching kids about sexual health will lead to them engaging in sex. Of course, thats not how it works, and these kids just end up engaging in sex while totally uninformed or in some cases filled with disinformation (for example, being told that condoms don't work - the parents think if the kids believe there is no safe sex that they won't have sex - but the kids end up having sex and don't use a condom because they believe it doesn't work).