In the movie •https://mydramalist.com/3197-neverending-story (2012), during the closing credits, beginning at 1:51:54, a joke is told. I don't speak Korean. In the English .srt subtitles, the ML tells a joke about a fool who is asked,

"Name three countries mentioned in the Three Kingdoms period."

"The fool's answer was 'A Cesarean!'"

The FL overhears this and bursts out laughing.

It may be me, it may be the subtitles,... but I just don't get the joke.

Can anybody help me? Thanks.