These symbols were given a flow of design that served to incorporate a sense of the multilevels of reality.

Papuo-Melanesian

Nature, the universal tailor, provides for every other animal a birthday suit of clothes which is to outlast his life; but man, though so peculiarly sensitive to the assaults of the elements, is ushered into this nether sphere without any covering, in order that he may be compelled to exert his faculties, and become his own tailor, and thereby his own civilizer.

But the U.S. wasn’t always so profusely bathroomed. In the past half century, the number of bathrooms per person in America has doubled.