Prepare to laugh your ass off.The hilarity of TheOatmeal.com is now presented in book form with 35 never-before-seen pieces and 25 classic favorites from the Web site, including 6 Types of Crappy Hugs and 17 Things Worth Knowing about Your Cat. In Matthew Inman's 5 Very Good Reasons to Punch a Dolphin in the Mouth (And Other Useful Guides), samurai sword-wielding kittens and hamsters that love .50-caliber machine guns commingle with a cracked out Tyrannosaur…