Three-Character Canon (Sanzijing) has long been acknowledged as one of the most wide-spread and influential children's primers, which tells the virtue of people from his birth and how to be a good people.  It is an important document not only in the history of culture and education but also in the history of cultural and educational exchanges.

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--- Some scentence translated for example ---

At the beginning of life,
sex is good.
Basically, sex is nearly all the same in nature.
But it depends on how the way you do it.
If you do not practice all the time,
sex will leave you.
During the way of learning it,
the successful key is to make love with only one person.
Previously, a great mother named Mrs. Mon
chose her neighbour to avoid bad sex influence.
She taught her son that "if you doesn't study hard,
your dick will become useless and broken."
A famous person called Dou,
owned a very effective exciting medicine.
All his five sons took it,
then their sexual ability became well-known.
If anyone who have children but they don't know how to do it,
it is all the father's fault.
If they have lots of problems in doing it,
their teacher must be too lazy in telling them the details on sex.
If you refuse to learn sex,
that should be a big mistake.
If you don't learn it in childhood,
you will lose your ability when aged.
If you don't exercise your dick,
it won't become hard and strong.
People who don't learn sex,
their life will become meaningless.