I slipped the bag-loving guy into a satin bag, leaving only his genitals sticking out. The body stays hidden, with just that part exposed—there’s something irresistible about it.
Since he could still move a bit, I tightened things up with rope and wrapped him down. Finished it off with a gloved handjob and an electric massager.
Hidden body, nowhere to escape the stimulation. Simple, but seriously addictive.