What is the function of humorous speech ending?

If the speech ends with humor, it can play a role in rendering the atmosphere and deepening the theme.

George Cohen said, "When you say goodbye, put a smile on their faces." If you have the ability and subject matter, that's fine, but how to do it? As hamlet said: this is a problem. Different people have different expressions.

Lloyd George once gave a lecture to the believers on the maintenance of the cemetery of the famous missionary Wesley (the founder of the American-Israeli-American church) at the gathering of the American-Israeli-American church. This topic is so serious that everyone can't think of anything funny. However, please note that George did it with his language and charm, and it was very successful. Meanwhile, please note that his speech ended so smoothly and beautifully.

I'm glad you've started renovating his cemetery. This cemetery should be respected. He especially hates untidy and unclean things. I think what he said was,' Don't let people see an American Israeli in rags.' Because of him, you will never see such beauty. (Laughter) It would be disrespectful to leave his graveyard in a mess. You all remember that once when he passed a place in Derbyshire, a girl ran up to him and shouted, "God bless you, Mr. Wesley." He replied,' Miss, if your face and apron were cleaner. Your blessing will be more valuable. This is how he feels about dirty. So, don't let his grave be in a mess. In case he passes by occasionally, it will hurt him more than anything. You must take good care of this cemetery. This is an unforgettable sacred cemetery. This is where you believe.