Oh. Alright. That would have been my follow up, but I was struggling to find the right way to word it, so I just resigned myself to not knowing.

"Heads" is an interesting, but accurate, descriptor.

I'm equally surprised you don't have an outlet in the bathroom, but that's a different discussion.

The way you're doing it is efficient at least, but if the mechanical part of the toothbrush fails, nobody gets to brush..... Or you have to move it around yourself I suppose, like a caveman.

Electric toothbrushes are a bit like escalators in that way. If it breaks, you can still walk up the stairs.