A Koan

A Koan makes no logical sense and is supposed to short-circuit your brain and provoke enlightenment. For a moment, your whole being isn’t and it’s like your head exploded.
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So anyway, I walked up to the wash basin in the bathroom to wash my hands after taking care of some bodily functions. There are certain expectations of what’s going to happen someone uses the facilities: they walk out without washing hands, they do a poor job washing hands, or they actually use soap to wash hands. So this guy walks up to the washbasin, turns on the water, then scoops up water into his mouth and swishes it around. No soap, no rubbing hands under the water action, just did his business and then slurped water out of his freaking hand. Who does that?