Painting your nails makes me think of the "As seen on TV" gadgets where they want to sell you a gadget to solve a "Problem" you don't really have, like straining pasta. On the ad they are making a mess trying to strain cooked pasta in the sink - "How many times has this happened to you?'" Um well, never. I know how to strain pasta.
I also know how to paint my nails without using any gadgets. But I guess the "gee whiz" factor triumphs again!!