What is the previous sentence that a couple is a couple when they break up? What is the content of the last sentence, breaking up a couple is a couple?

1, it's okay to have a reunion, and a couple who break up is a couple.

2. "It's nothing to have a class reunion. A couple who break up is a couple." This sentence has spread among many people who have attended the class reunion. This seems to be a joke, but it tells the gray psychological state that some men and women are affected by emotions after attending class reunion in today's society. Indeed, after attending the class reunion, someone contacted a classmate who had been longing for it for a long time. Then, using advanced communication tools, or telephone or WeChat, I broke the once beautiful emotional door in an informed state. They used to be afraid of being touched by emotions, but now they have entered an emotional entanglement that they should not enter. They also got into many unsolved troubles.