Mine was done solo. I was actually high on marijuana (for some reason I get reeeeaally horny when I'm high). Also when high all my nerves endings are on tippee toes and I'm super sensative. Anyway I actually began by orgasming over and over and over without ejaculating. So much that it wore me out. Kind of like a woman who stops you because she can't take it anymore. So anyway I slowed down for a few minutes and then finally brought myself up to the big climax and literally had a "scrape me off the ceiling" orgasm with ejaculation that lasted for over 60 seconds. Count sixty seconds. Whoa. Only happened one time. Must have been some good weed.
Edit: Drugs are bad. Don't try this at home
