In A Dream of Red Mansions, why did Jia Baoyu tell Daiyu the story of Laba porridge?

Jia Baoyu really likes Lin Daiyu. Lin is in poor health, but she has slept too long. The book explains that Baoyu knows that sleeping too much is bad for his health. Caring for her and waking her up is better for his health, so he wants to find such a topic to keep Lin Daiyu's appetite.

At that time, it was almost the festival of eating Laba porridge, so I thought of this story on a whim. In fact, Baoyu's talent is still there. He deliberately made the story particularly interesting. I also went to Lin Hang to whet Daiyu's appetite. As a result, Lin Daiyu really came and woke up. Wang Pingping is very happy. But this story is also to be finished.

He later said that the little mouse suddenly became Lin Daiyu. I think this is a flirtatious, intimate and loving interaction between couples. Couples are also black with each other. Lin Daiyu got angry when she finished, so she went to pinch him. Anyway, Jia Baoyu likes being bullied by Lin, and both of them are very satisfied with this romantic mode of life. It's nothing to make up for it once.