Where and how, if at all, should sex education be conducted?

So when a man and a woman falls in love, they go to this conference where sex education is taught there. Sex is an issue causing unplanned pregnancy, sexual transmitted infection, and unhealthy relationships. Sex education should be taught in schools or in health class. Schools are already doing this and it has helped many teens to keep abstinent. Teens should be taught some important facts about sexual intercourse, the consequences, and how to stay abstinent. However, most teen pregnancy occur in poor rural areas. Is it because sex education isn't taught over there? They should put more focus on the poor areas and teach teens about troubles of sex.