Not to divert attention, but good point you make, Leroy.
I know this from experience, and I was often mistaken as a Japanese around school. So combining my two experiences, it is quite safe to say that a real Japanese in the middle of US will get a real sweating experience.

Not to turn this into a mutual bashing competition, I think the analogy can be found in the chameleon reflexes. They only notice movement, and given that stimulus, the tongue just shoots out without even thinking. Sentries' long hours of night duty works the same way, and so does a good part of the digital image compression technology that we are using right now, and also the compression/encoding of cellular phone signals works the same way.

Wait, it wasn't chameleons; it was the frogs. My bad. @_@