I read it first when I was in my late teens. I read it again after the war on terror (tm) had started... let's just say it was the difference between reading a book about sex as a virgin and as a man. Books of that caliber, that are that short, are rare enough IMHO, and reading them every decade can't hurt? Anyway, you can't know if you get something new out of it unless you tried it at least once ;)