ergs and dynes

are they crunchy or soft,
ergs sound like velvet with patches missing,
rubbed off over time by too much loving
and dynes must certainly sparkle,
be diamond like of course, but will
sharply correct if you're not careful
with your joules.
ergs and dynes, joules and pascals
and si units, and universal constants,
centimeters and meters and kilometers,
slugs and feet and yards,
our minds get soft, we crunch on
pebbles as we walk barefoot
through the park, our heads in the
clouds.