People
Doris Day is as wholesome as a bowl of cornflakes and at least as sexy.
— Dwight MacDonald

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The comparison starts by calling Doris Day wholesome, then makes a bowl of cornflakes the measure of her sexual appeal. The apparent compliment turns into a put-down. Its dry humor relies on treating a bland breakfast as an unexpectedly deflating standard for glamour.
Context reviewed