Some people study masturbation at arms length. Others get hands on — for a good cause, of course.
The long-running event, which raises money for the Center for Sex and Culture, is structured like other "thons." Participants get sponsors to pledge based on their performance ($X per minute, $Y per orgasm), whether they are up for a marathon or just a fun run. There's even a handy signup sheet (a fap sheet?) you can download. And since the center is nonprofit, donations are tax deductible! (In your face, Uncle Sam!)
Masturbate-a-thon is open to all comers, though organizers sound serious about this being a "solo-sex event" — touch all you want, but just touch yourself. (Cue the Divinyls.)