Take a knife that is not too sharp and press it into your partner. Work slowly so he can find the best way for himself to avoid getting cut or stabbed and change positions from time to time. It is best to start with just the body moving while you sit on your behind and find from there the different movement your body can create and to learn to use each hip on its own freely. Add this one simple turn to this drill while already standing and later on sitting down as well to help each other learn the reality of a blade point and blade by twisting the blade inside as you would a screw. This will help in learning to move your entire body and to avoid resisting the movement as a whole. You have to give permission to the blade to travel rather than trying to first move it or redirect it and get yourself harmed.
Move with care and relax yourselves rather than sprint to a fixed finish. Move and work from different directions and positions and avoid stopping and zeroing your work to an initial stage. Work from where you are as in a real contact. keep breathing and stay honest.