My sister was adamant my niece wasn’t having sex that she was a “good girl”. I kept saying “you’re stupid if you believe that. Remember how you were when you were younger. I was definitely having sex in high school and I was a “good kid””. Guess who had to refrain from the “I told you so” when they found out she was pregnant.
You see the bad sex education when you think "a good girl" is the one not having sex. Sex is perfectly normal and teenagers will have sex, at least teach them about it