Not just human hands, of course.
I meet some animal people, new-evolved--
furred, tailed, dark-eyed, wise. Forepaws
clever but stubby still. I advise
"Be sure to make

opposable thumbs--good hands are a great
advantage. Beware--who knows when
this era of thumb-fluidity will end?
Don't get stuck in a bad design."

Hmm. I wonder if that might apply
to any other recent changes. Mine?