It's interesting how you build social stock around here. Sometimes the thought of pain is a greater controller than the physical pain. For me, to place my Uke in the form to apply a painful technique has a greater result than can be achieved by mere pain. It is the anticipation of that pain, that more often than not is the effect I'm looking for. Because in that anticipation I capture their mind and their mind captures their body with the knowledge of past experience.
All aggression stops and they are trying very hard to maintain harmony.
To do other wise causes them great pain. However, it is a pain that I am quick to release when they stop fighting. The body can become used to pain and over ride it. If the application of the technique results only in joint pain and not control of Uke's center and mind then they may choose to sacrifice the limb to continue the attack. I seen people with broken arms continue the fight and win.