On Sunday, SoMa's Dore Alley turned up the heat for their annual sex fetish festival, the Up Your Alley Fair. Described as a smaller Folsom Street Fair, but for adults (let's face it, the Folsom Street Fair, while still loads of summertime fun, sees more baby strollers and feather boas than it does chaps and poppers), attendees drank beer, met other like-minded folks with similar fetishes, and even played a game of semi-naked Twister.

Note: while all of the people in these photos have their bathing suit areas covered up (more or less), these are generally SFW, but if you want to be on the safe side, wait until you're at home to view them!