What is the ROI on that?

I was looking at some craigslist ads again, they are endlessly fascinating and a bit frightening. I'm struck by how often I see a man advertising for a domniatrix. They offer to clean your house in exchange for "firm handling." One guy said he would do laundry and mop the floors if you would hit him, kick him and spit on him. Gee, I think it would be easier and less creepy to do my own housework...