The Fundamentals of Fapping.
"Fapping" is used to represent the sound of someone masterbating. So when combined with the word Fundamentals, you get Fapamentals, which is the basics of masterbation.
Chris: I want to learn how to masterbate.
John: Well, you better use this book of Fapamentals, I wrote it myself.
Chris: Thanks! This will come in handy.