Fun fact to keep in mind about your MX4 - if you use the “pair with two devices simultaneously” feature, the headphones shut off their LDAC support. All you get is the baseline audio codec. Nice, huh?
My brother had a screen that would occasionally reboot with fullscreen video, but not if you kept some window decoration onscreen. There must’ve been some degree of (you can not turn it off) image processing that would shit itself. Maybe it was local dimming related.
Everything is filled with software, and a lot of it is hot garbage.
Dry skin is hundreds of thousands of ohms. Even wet skin has pretty good resistance. When you touch a 9v to your tongue, you’re starting to mess around with lower resistance flesh, it is definitely not a comfortable thing to do.
The metal ring doesn’t do anything to move more electricity into your body, but it soaks every electron the battery can push and turns it into heat. Best I can figure it would amount to a few watts, which would be toasty if you were holding it between your fingers. The septum is a thin piece of flesh, I think it would sauté pretty quickly.
An AAAA cell has 200-350 mohms internal resistance. A 9v battery has 6 of them in series (many of them are literally that, others have their cells as a stack of plastic buckets). The nose ring is a short run of wire, it’s idunno a 0.2 ohm heater?