Ejaculate required for super O ??

If you read or search through this forum, you'll find a lot of info on your questions. But I know that can be a lot to wade through. By "dry orgasm", I'm assuming you mean an anal, prostate or super-O orgasm. You could also have a regular (penile) orgasm that is "dry" if, for instance, you've ejaculated once or twice recently and there is no semen left to come out.

Is it neccessary for one to have ejaculate in order to dry orgasm?

"Dry" orgasm means there is no ejaculate. But you could still have precum and prostatic fluid coming out before the dry (anal/prostate/super-O) orgasm occurs.

I assume that dry orgasms do not create the same refractory period as ejacululatory ones?

If it's not a regular (penile) orgasm, then the refractory effect does not occur.

*** Why are they referred to as "super O's" are there no regular O's?

As far as I know, we are talking about three distinct types of orgasms:

(1) Regular (penile) orgasm: The sensations are centered in the penis (with some contracting of the prostate as well).

(2) Anal or prostate orgasms: The sensations are centered in the anus, rectum and/or prostate area. Sensations in the penis are minimal.

(3) Super-O: This is a whole-body experience. I've not experience this myself... but you can find plently of descriptions of it in this forum.

All of the above is based on what I've read and felt personally. Anyone out there can correct me if I've mistated anything.