[yorwba]

Especially not if it's your own poo. You might keep reinfecting yourself with some bacteria or parasites that would otherwise have a slim chance of staying in the body, but the human immune system is pretty well-equipped to handle that.

Having your own toilet in your own kitchen is probably more sanitary than separating toilet and kitchen, but sharing them among multiple people.

[JshWright]

There are all sorts of bacteria that are no problem in your lower GI tract, but would be massively dangerous elsewhere (your lungs, for instance).