Originally posted by Steff
I think you have to be careful to differentiate between pain and control. The pain may arise, especially in pinning techniques, but it is just a tool to keep control over the center of uke. But it is necessary - as a control whether nage applies the technique correctly.
I don't think pain is a necessary component of any technique; it may
happen as a side effect, but I don't think it's the primary purpose of any technique.
Pain is not guaranteed to affect everybody out there. People on drugs or those with high pain thresholds will just shrug it off. I've had the opportunity to try my best nikyo on my teacher and he just stood there. Asked if it hurt by someone else, he said, "Oh, it hurts, but it's not something that would take me out of action"...