People
The secret to staying young is to live honestly, eat slowly and lie about your age.
— Lucille Ball

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
Lucille Ball lists three habits for staying young, and the first two sound sensible enough. Living honestly and eating slowly could pass for real advice on their own. The third habit, lying about your age, quietly reveals the whole list as a joke about vanity.
Context reviewed