Despite its puritan roots, the U.S. has a long history of skinny-dipping. Social nudity is celebrated in the writings of Walt Whitman and the landscape paintings of Thomas Eakins. Benjamin Franklin took a daily naked "air bath," while presidents John Quincy Adams, Theodore Roosevelt and Lyndon Johnson enjoyed a refreshing nude dip. According to National Geographic Magazine, John Quincy Adams (1825-29), the sixth President, customarily took a nude early morning swim in the Potomac River.