OK, so I read before buying that there were a lot of blue jokes in this collection. That didn't bother me-- I'm not a prude and I'm quite fond of racy humour. But I have to say, I was disgusted and bored by many of the filthy jokes in this book. It goes way beyond innuendo and suggestion. Every few pages, at the least, our attention is drawn to male anatomy or deviant sex practices or bodily functions. If you like that kind of thing, go ahead and buy. If you'd rather something you can read while eating, get another joke book.
It doesn't have many jokes for an "encyclopedia" either.