"Dine and 69" is a suggestive phrase implying a dinner date followed by a specific sexual act.
Explanation
The phrase builds upon the common expression "wine and dine," which suggests taking someone out for a pleasant dinner, often with the intention of romantic or sexual pursuit. Adding "69" explicitly references the sexual act where two people reciprocally perform oral sex on each other. Therefore, "dine and 69" implies a sequence of events: a nice dinner (perhaps including alcohol), followed by the aforementioned sexual activity.
In essence, the phrase clearly states the intention of both a romantic and sexual encounter.
