10th Annual Masturbate-A-Thon (Really NSFW)

This was the 11th year of San Francisco's annual Masturbate-a-thon, a fundraiser for the nonprofit Center for Sex & Culture on Mission Street. First held in 2000, the event was created to normalize self-pleasure by bringing it out in the open. Dr. Carol Queen, one of the founders, said the goal is to make a charity masturbate-a-thon as mainstream as a walk-a-thon.That day still isn't here. But about 250 people attended the event this year at 1519 Mission Street, including both masturbators and voeyurs, some of whom had come from as far as Chicago to observe the action. Click through for photos by Gretchen Robinette. Read more in Lois Beckett's "Behind the Scenes at Masturbate-a-thon".

Masturbate-A-Thon 2008.
Masturbate-A-Thon 2009.
Masturbate-A-Thon 2010.