When I was a tot, my parents threw me a birthday party at McDonald's and invited all the neighborhood kids. It was amazing (well, to a two-year-old, at least)! And, as an added bonus, McDonald's treated me to a present as well! They presented me with a plastic bowl and cup (with a sippy type lid) that had pictures of all the great McDonald's characters. It was love at first sight.
To this day, I have my little bowl (the cup and lid were lost to two separate and equally devastating incidents in the dishwasher) and I have it kept neatly away in my office desk drawer. Of course, the little characters have long since disappeared, but the bowl remains. I use it to eat a multitude of meals requiring a bowl and I wash it by hand in our little sink with a dollop of dish soap after each and every use.
However, sometimes I can't wash the bowl right away and it requires a little soaking. I have learned that you cannot soak with the soap in the bowl as it is very old plastic and it seems to eat any material cradled in it's aging arms. This has not been a problem with my salads or my soup, but for some reason the magical powers of oatmeal have seemed to be able to draw the soap back out and into the creamy oats, which find their way into my mouth.
I have never had my mouth washed out with soap, but I can understand why it is such an unpleasant experience. I think I will requiring a different bowl specifically for my oaty breakfast.