You are allowed to use your hands after they are cuffed behind your hand. Anything you can reach. You are not allowed to unlock them before you managed to make yourself cum or tuck your shirt in in advance. I would suggest you think carefully just how you are getting on the floor to be in roughly the "right" position and need to squirm a little less to get into position. I have a feeling the frustration of it being difficult to get into position is only going to make the orgasm better, so that's all the concessions you are going to get
