Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Worthless! A total waste of time and money!

There are not words to describe how absolutely worthless this book is. It explores the outermost boundaries of suckiness. It is not a collection of sex secrets but instead an asinine mish-mash of idiotic comments, most not even relating to sex. The author should have his writing/compiling priviledges taken away. There are plenty of good sex guides out there, buy one of those and do not waste your time with this one.