I can not speak for Wild on the point of the "o".. I do know that having an "
o" doesn't always mean masterbating ,in fact it's a rare occasion for me if at all most of the time now a days..
You can get the "o" feeling with out going through the typical stereo type method there is such a condition a "o" can last a long time and is different from ejaculation although they could or can happen at the same time..
Here is a link ..http://www.whitelotuseast.com/MaleSexuality.htm