For such a little book this is an excellent fun item. I bought it as a stocking-filler for my just-teen son last Christmas and he absolutely loved it!
I don't know if the author intended it as an educational aid but, surprisingly, it has been!
There are just some questions you can't ask your Mum, right? Rather than trivialise the somewhat eyebrow-raising title subject, I found this little gem injected a sense of humour into a couple of tricky subjects.
So, not only is it a hoot, but it has spared a few blushes too!