Little Willie questioned his grandmother with an appearance of great seriousness:
"Ain't Rotterdam the name of a city, Gramma?"
"Don't say 'ain't', Willie," the old lady corrected. "Yes, Rotterdam is the name of a city. Why?"
"It ain't swearin' to say it, is it Gramma?"
"Don't say 'ain't', Willie. No, it isn't swearing to say Rotterdam. Why?"
"Cause if sister keeps on eatin' so much candy, she'll Rotterdam head off."