Well, I’ll say this, as of right now, I have not gained in sized from using o bends. However, when I do them I do get a nice pump. Correction, sometimes I get a good pump. To be honest I’m not that sure if I am even doing it right most times. I seem to get a good pump from it when I do them in the bathtub for some reason. I’ll have a crazy thick flaccid hang for hours.
I know everyone says to bend, hold, and continue the process towards the glans, but I find myself doing something of a horse 440 while bending. To me that seems to feel more like a workout than bending alone. I have not done an official measure yet, but the last time I did measure, just to see how much of a pump I got immediately after an o bend workout, I was 1/8 of an inch bigger in girth. Didn’t last long though, I live in Chicago and our winters get very cold, making my flaccid really tiny.
But if you get a good workout from doing o bends, and you get a nice pump from them, please post your technique for others to follow. Although this is a popular girth workout, I have learned that not many people even know what the hell they are doing.