And what is it??
You don't give any information about that,
and googling "O" isn't proving to be any help at all;
So I won't know how to avoid O if I don't even know what it is...

Do you mean The Story of O by Pauline Reage?
I read it years + years ago, and while it takes the idea of sexual submission
all the way to its extreme and obviously wouldn't be most people's cup of tea,
As I recall it was a good sight better than that sucky stupid 50 Shades of Grey
which I was never masochistic enough to be able to finish reading.

And really any kind of erotic fiction does very little for me
unless I'm in a very rare mood that occurs maybe twice a year.
and lasts about a day. Seems I'm not totally asexual,
but damned near....
~hugs, Veronica