"Cao Yi, let me tell you a joke..."
"You said."
"There used to be a girl named Shuangshuang. One day she died. Her family was very sad. They were all crying and shouting: It's so cool, it's so cool, it's so good, it's so good... Haha... Hahaha..."
"..."
…
"Zeng Xiaoyu, stop telling jokes..."
"Why? Isn't it funny?"
"Yeah."
"I feel like there's something wrong with your laughing muscles... You don't seem to be able to smile anymore."
"Really? Then please let me learn how to laugh again..."