Hehe, now I remember. I just wasn't interested in this aspects when I read the series. What is appropriate or not for that specific boy, I can't say. At least there are no explicit sex scenes, as in describing the act. What references are offending or not, lies in the eye of the beholder.
Like you I loved the books as a kid. Now I think they are badly written, have large plot holes and only comic relief characters. But they must have something that attract kids. At least they are better than the books about a certain dark elf ;-)
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