One of my favorite kinks and so rare even with all the bondage lovers. This is the ultimate form of bondage the purpose not torture but to make the girl totally dependent on you and no way to escape or even give herself pleasure. As seen maids with limbs can provide all the feeding, cleaning and help move them around in sex. Or you could use advanced robots, magic spirts no need to do the cleaning, feeding and constant care unless you want to.
Killing them is letting them escape! Can not kill em unless you can bring them back tife at least. Sanity kept by electo shock, drugs and evil counselors but one can just treat your plaything wonderfully your preference.