Hey, I researched this thing about not having orgasms, and I found a few things, but I'm not sure if you would find them interesting. The prostate, after a long time of not ejaculating, can actually atrophy, causing a man to become infertile. (Like I said, not really something eunuchs would worry about.

) Some people attribute this to the fact that the prostate is 70% muscle, and muscles which are not used atrophy over time. And about the technique that A-1 posted, he was right about it not being too safe. (I think the technique is playfully called injaculation.

) Immense pressure on that area can cause problems, as stated here:
http://www.jackinworld.com/library/articles/injac.html

Yeah, I just love masturbation.
But anyway, if you're not particularly interested in having children, not having orgasms is pretty safe. I wouldn't wanna try that, though. (I wouldn't wanna "blow myself to smithereens" now, would I?

)