It is all about a gang of guys who hang out together and joke with people. Once they had fun joking one of their many victims, three of the boys decide to betray the fourth one so that when the police come, he could be sent to jail. So that is what happens. There, they put him under control and try to change his nature radically, like when he thinks about sex, he would feel sick and throw up. Would they succeed?
I loved this book. It is hilarious and at the same time horrible, because one can be surprised at what the human mind can think of. Still, it is really nice and addictive. Even though it was written in 1960, it does not sound dated at all. It is rather realistic and modern.