Reprogramming Rings

He invented a set of rings that, when worn by a woman, would reprogram their minds. The rings had certain things written in the center of each, like 'Maid', 'Wife', and 'Pet', and thanks to some nanotechnology, the woman who wore the ring would fully believe she was whatever was written on the ring. Furthermore, if a woman wore more than one ring, she would be a combination of however many rings she wore, so if she wore a ring that said 'Maid', and another ring that said 'Wife', she would believe she was John's wife who enjoyed being the household maid, and if she wore a ring that said 'Robot' and another that said 'Pet', the woman would believe that she was a robot programmed to be a pet. The world was his oyster with this invention.

He opened up a small jewelry store to sell the rings to any celebrity who walked through the door.