People are measured in imperial. Except newborns who are metric.
No new parent I know tells anyone what their baby weighs in metric. It's well understood that if your baby weighs more than 10 pounds at birth, you'll never be able to sit down without a rubber ring again.
not that Americans would get the ironing.
IRONY! Ironing is removing creases....sigh...
In 1750 Issac Newton became discouraged when he fell up a flight of stairs.