Toothbrushes were mentioned, and I'd assume that the toothpaste does a good enough job at killing bacteria that it doesn't make a difference, aside from that the bacterial load is probably low enough to be negligible.
But yeah, you don't want to be thinking about putting a pooey stick in your mouth either.
I mean, we still CLEAN our toilets when they’re still just visibly stained with hard water or whatever causes rings and whatnot, so I can see the feeling better about being a huge component