As a man, there are certain things you know: How to bong a Beast. How to belch the alphabet. How to sweat like a pig. For everything else, you have Thomas Fink, author of “The Man’s Book: The Essential Guide for the Modern Man.” What can he teach you that you don’t already know? A lot, (and don’t kid yourself). Do you know how to tie a bow-tie, mix a martini, or make a potato gun? Do you know when to get married and how to break up, or the difference between a bock beer and a bitter? Do you know which urinal to choose or how to start a fire with a Coke can?