Multiple Ejaculations-gctid9841

Im sure this has been talked about a lot but it might be worth a new thread on it. If you google multiple orgasms male, you get many MANY videos on it on xtube etc. this one for example:

http://xhamster.com/movies/2770975/multiple_orgasms_cumming_nonstop_how_many_do_you_count.html

Now if i hadn't had my own multiple ejaculation experience i would have though that this is BS, or perhaps the guy wasn't having orgasms, just ejaculations that are somehow spread apart or stifled in some way. With my own experience i needed something pressed firmly against my prostate, i have had multiple ejacs from a dildo and from the aneros tools as well (helix and peredise) Both required a lot of muscle tension and things that can possibly get in the way of aneros sessions going normally.

With the aneros devices i found that it was more or less a double orgasm with a second or two separating them. So i would have one, shoot a massive load then i would wank my cock again for a second and i would cum again.

With the dildo it was more or less out of my control. I would get to a point where i would ejaculate (a massive load as well) then it would cum around every 3-5 seconds after one another (totalling 3 maybe 4 times max) Each time was amazing and the cum would be less and less, but by the end i was drained.

I just don't get how guys can control it in the way that they are. What about the chemicals release when you ejaculate that make you tired/sleepy? what of the refractory period? doesn't seem to effect these people? (I'm not even sure i can reproduce my session with 5 orgasms in, it was seemingly a one off)