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Sunday was a day of sin and salvation, naked men and women, ass-less leather chaps and vegetarian hot dogs. The 2008 "Up Your Alley" festival, held in SOMA, was packed with over 10,000 people, the majority of them wearing almost nothing at all. This only-in-San Francisco event had even the most decent people turning their heads away from the somewhat unsafe sex on every corner. Photos shot on 7/27 by Sam Heller.