The new book Secret Lives of the U.S. Presidents, by Cormac O'Brien dishes White House dirt. Some examples:Gerald Ford allegedly had a flatulence problem, "often blaming the Secret Service men surrounding him." (That sounds better than blaming the barking tree spiders.)George Washington spent an estimated 7% of his salary on booze. (He loved Laird's Applejack)Zachary Taylor died from an overdose