During my years in the Peace Corps, I lived in the town between the water treatment plant and the reservoir. I drank unboiled tap water regularly. Although that may be less indicative of a lack of common sense than dangerous levels of laziness. And I still got sick less than the volunteers who were properly careful.
On three separate occasions, I have reached afternoon before realizing my shirt was on backwards (plain, solid-colored t-shirts, but there's still the tag).
When cooking rice, it turns out you can't make it cook faster by turning the heat all of the way up. And when cooking lentils, having forgotten to soak them is not fixed by adding more spices.
It is possible to give yourself mouth-blisters by eating too much fresh pineapple. Sensible people never reach that point. The trick is to stop once your lips start stinging.
My complete lack of common sense
On three separate occasions, I have reached afternoon before realizing my shirt was on backwards (plain, solid-colored t-shirts, but there's still the tag).
When cooking rice, it turns out you can't make it cook faster by turning the heat all of the way up. And when cooking lentils, having forgotten to soak them is not fixed by adding more spices.
It is possible to give yourself mouth-blisters by eating too much fresh pineapple. Sensible people never reach that point. The trick is to stop once your lips start stinging.