WesDym@Gargron Through most of history, most doorknobs were textured in some way to make them easier to manipulate. Check out the knurled metal jobs in great old buildings, or the decorative 'crystal' designs in many older homes. Some of the oldest ones aren't even knobs, but rotating levers. Modern smooth ones are only about a hundred years old, if that, and are apparently the product of 'modernist' sensibilities by psychos.
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