Raising more than money
Some people in London plan to do just this, and (according to The Guardian (work safe) raise money for safe sex groups in a sponsored Masturbate-a-thon (probably not work safe if you think about it).
And Channel 4 intent to broadcast it as part of their late night programming.
It's the stats that are scary...
"Prizes will be on offer for those who clock up the most orgasms and those who can masturbate the longest - the current record, according to the organisers, is a chafing eight-and-a-half hours."
So if you meet someone walking like John Wayne with bandaged hands after August 6th, you'll know why.