An old thread, but it was the most appropriate I found.
I recently experienced multiple orgasms and just wanted to share it with you all.
I don't generally do much kegels, but I think the trick is doing them at the right time.
The thing I do is to stop masturbating for a couple of seconds (at random points) and do a few kegels, then continue. When I feel like the orgasm is near, but not there yet, I stop and again do some kegels, but it's not actually delaying the orgasm a lot, just "preparing" for it by squeezing the PC muscles. Then, a dozen seconds later, when I feel I can't hold it back anymore I let go of my penis (provided I am using my hands

) ), squeeze the PC muscle as hard as I can and then experience a full-body, intense (almost as a regular) orgasm with little to no ejaculation - 1-2 drops of semen at most, if I do it right. And it feels great, the orgasms later when I do ejaculate are some of the best I've ever had.
I don't achieve 100% success, but I try to recreate it every time I masturbate and have at least 1 or 2 orgasms before I get to the final one when I actually ejaculate.
So, to summarize - the keys for me are kegels, preparation and timing.
Women no longer are the only to have this privilege! Have a great time with yourselves (and later your partners), guys