starts at home. However, a good, comprehensive educational program in school can also help to reinforce what Mom & Dad have talked to their children about.
Some parents tell their kids "don't have sex until you're married or in a committed relationship" which is unrealistic. Children should understand how sex works, why people have sex, how babies are conceived, and - yes - how to avoid conceiving and catching STDs. That's reality.
As I said to a friend of mine fretting about her teen daughter heading off to college: The best thing you can do is arm her with knowledge; it's up to her to use it.

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