My boyfriend and I like the mutual masturbation stories on SOLO and wanted to reply and let everyone know that we think shared masturbation is the way to go. I met him through a group of "friends" that would try to meet twice a month for the express purpose of sharing sexual ideas, exchanging thoughts and, ultimately, masturbating.
It started out as a few girls that I went to college with and gradually we expanded the group to various friends/boyfriends/girlfriends. Personally, I find the sharing of such an intimate activity with others to be amazingly liberating and almost spiritual. I anxiously look forward to the second and third Tuesday's of every month!
With my boyfriend, I've found that in the past four or five months I spend half of my masturbating experiences being done with him. It is a huge turn-on for us both and I think that it has increased our communication skills to be able to share such a personal experience with each other so often.
Good luck finding like-minded people!