A YouTube video called "Bodhisattva in metro":
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Mark Twain said,
Laughter which cannot be suppressed is catching. Sooner or later it washes away our defences, and undermines our dignity, and we join in it — ashamed of our weakness, and embittered against the cause of its exposure, but no matter, we have to join in, there is no help for it.
—From "Indiantown"
Mark Twain also said, "Man is the only creature that blushes, or needs to."
