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Mama always knew how to treat me right. For my 18th birthday, she prepared my favorite meal... tuna fish on white bread with mayonnaise, a Tab, and a couple of Twinkies.
— Navin • The Jerk

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
He fondly recalls his mother's idea of a birthday feast: tuna on white bread with mayonnaise, a Tab and a couple of Twinkies. The humour is in how earnestly humble the menu is. To him, it's the height of being treated right.
Context reviewed