Ah, Asian parents. They don’t broach the topic of the birds and the bees until after you’re safely married. Only then do they slip in book wrapped discreetly in a brown paper bag into your suitcase, and wait till you’ve flown home before calling up and telling you to read the book. To teach you how to make babies, they say.
According to the excerpt, the book was written sometime during the warring states period. I wonder how many editions it’s seen.