Do you edge?
I've recently been studying Taoist sexual practices, and discovered it's possible to have intense orgasms without ejaculating. The Taoists have this concept of "moving the energy" from your balls/dick to other parts of your body.
If you get the feeling, check out the thread I started about it:
http://www.lpsg.com/347930-taoist-sex-practices-confirmed.html
I had known about Mantauk Chia's book "The multi-orgasmic man" for some time, but after watching the video in that post, I did some more research and got a hold of another Mantauk Chia book :
"Taoist Secrets of Love: Cultivating Male Sexual Energy"
In that book, he gets into more of what you're saying.
I'm still not sure I believe all the meditation and energy movement stuff, but I've been trying it anyway, as an experiment. I figure if people have been doing it for centuries, it can't be complete hocum!
I'll let you know how it goes, as I haven't made it much past day 10. At any rate, you seem like you might be interested in learning about some of the Taoist techniques as well.
One difference is that I can have actual sexual intercourse with my wife, and have multiple orgasms without ejaculating, and then simply stop. It feels incredible, and after a lot of practice, I think they're actually MORE intense than an ejaculatory orgasm.