How did past societies give their kids "the talk," or did they?

So I'm totally not an expert on this at all, but seeing as no one's helped you out yet, I figured I'd contribute what I do know. My focus is eighteenth century France; after the notoriously awkward start of the marriage of Marie Antoinette and Louis XVI, Antoine's brother, the Holy Roman Emperor Joseph II of Austria, visited the couple at Versailles and reported back to his mother that poor Louis was under the impression that the "important" part of the act was the insertion, and not the insemination. This indicates to me that neither part of the couple ever received a very comprehensive discussion on sexuality; they may have been given the basics -- i.e. put the penis in the vagina -- with the not-too-illogical assumption that the feeling would be enjoyable and therefore encourage orgasm without the penis being removed from the vagina. Joseph also reported that Antoine told him about Louis having orgasms by himself in the bed after he'd already pulled out of her.

So, that's an interesting tidbit, I suppose. It doesn't necessarily imply that there were NEVER any real "sex talks" given to children, and there could have been other factors involved (i.e. their respective guardians neglecting the subject), but it's still notable that two such prestigious figures were literally clueless about the whole ordeal.