kareem_nasser wroteso sexual development is from the beginning and like eating it needs rules or limits otherwise we will become animals.
we ARE animals...
and we're not even the only ones who have sex for purposes other than reproduction (pleasure, prostitution, ...)
Other animals can have very similar sexual lifes to ours, like monogamy, homosexuality, prostitution, sex for pleasure, masturbation, ... with all the "rules or limits" we have, and they don't need to read books to have this behavior and whatever rules or limits we're supposed to learn not to become animals.
I agree that it should be taught in schools, but for reasons very different than not becoming animals, it's more for maturity, knowing your body, your rights, protections, risks, ...