Yeah. And for that you'd need at least one of your hands. Which is why I find basic aikido osae impractical.
One of my aikido teachers taught nikkyo osae and sankyo osae as stretching - never pressing down on uke's shoulder but just twisting uke's are over his/her head, with the feeling of lifting rather than pressing. Very pleasant for uke, and he stressed that.
If you want to perform dislocation in nikkyo osae and sankyo osae. How do you do it?
Imagine uke's arm throughout yonkyo, do that.