Contrary to popular propaganda, size does matter. To our delight this obsessive and primal preoccupation with the stature of ones manhood compelled men from all over the globe to photograph their trouser snakes in the most inventive ways and slingshot these intimate portraits into the public cyberspace for us to enjoy. Men 'exhibiting' their Johnsons is nothing new, Da Vinci probably painted a few dick pics of his own in his time. But it's the first time these practical portraits have been bundled in a book. 'Useful Photography #13' takes you on a wild ride through the magical world of flesh photography that is both humorous and at times, unexpectedly educational.