Just looking at how curled-up my slave's toes are allows Lady Annisa to tell her exactly how hard she should push that sharp pinwheel into his balls to acheive maximum rubber bondage discomfort. He's not going anywhere in that heavy rubber body bag strapped to my medical bench: well at least not until he has produced the sample we've been seeking. Hours of tying and teasing mean that there should be a sufficient quantity of his man fluid for our vital medical experiments to continue.