A girl had reached four without giving up the habit of sucking her thumb,
though her mother had tried everything from bribery to reasoning to
painting it with lemon juice to discourage the habit.

Finally she tried
threats, warning her, "If you don't stop sucking your thumb, your stomach
is going to blow up like a balloon."

Later that day, walking in the park, mother and daughter saw a pregnant
woman sitting on a bench.

The four-year-old considered her gravely for a
minute, then spoke to her saying, "Uh-oh .. I know what "you've" been
doing."