Here is a video (24:27) by Technology Connections talking about the TV Guardian. There’s also this video (20:59) by Ben Eater, who looks at the memory chip on the device to figure out how it works. It’s pretty neat, and I recommend both videos if you have some spare time.
…what? Wipe front to back. Otherwise you get a bunch of nasty shit in a place that can’t really handle that. Poop near the vagina can cause infections.