Yes you read the title of this post right: orgasms can not be stopped once they begin.
When your body reaches a heightened level of arousal near climax, the brain releases several chemicals and signals to the body that cause muscle contraction and a rush of blood to the groin area. Once these chemicals have been activated, it is nearly impossible to stop the rush of ecstasy you feel within a climax. During these chemical reactions, the mind is in a euphoric state that may feel like a dream state, while the body contracts, jerks and tingles with sensation. Interesting isn't it?
If you feel that rush of energy surging through your body, don't fight the feeling...just let it flow :-)