I once got a little bit of toilet water in my mouth while pathetically trying to fix a shit-filled clogged toilet with a wooden stick. Needless to say, it was a pretty horrific experience. If it had in any way been doable, I would have been prepared to remove the exterior layer of my lips, tongue and palate, as well as having all my teeth pulled out, the second after the water landed in my mouth.
Looking back, I'm glad I didn't go so far as to torture my mouth to cushion the blow of basically having shit in my mouth. But it does not come recommended. In all honesty, it's pretty nasty.
Argh... This was a bad memory. I wonder if this was "the obvious".