Personally, I feel that a large part is also dependent on how comfortable you are, as a parent, with regard to the topic. If you are uncomfortable discussing the topic in details openly with your children, it may end up sending a wrong message.
It is natural that children will become curious as they go through puberty. And I feel that it is important that parents are the ones giving them information on how to protect themselves, and respect others. So it will be good to still have a discussion on it when a child reaches the appropriate age. If one is uncomfortable with going into any details, the important massage would be how to respect themselves, respect others, and learn to be discerning.
Just my two cents.
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