Life is full of ups and downs, and humor often accompanies it. What does that mean?

Life is full of ups and downs, and humor always accompanies it! Happy every day! Joke 1: Selling yourself, selling yourself. Walking on the street, a very old woman's voice came from behind: "Selling yourself, selling yourself..." I was shocked: "There is no country without a general." What kind of society is this? All the old ones are out for sale! While he was feeling angry, he looked back and saw an old woman in her 60s holding a red cloth bag with a ginseng tree exposed inside. Joke 2: Don't be stingy this time. When Dasha entered a certain country, he brought a myna with him. The customs officer stopped him and said, "Sir! Your myna also has to pay taxes." "How much should you pay?" "It's $50 alive, and only $15 if it's a specimen!" At this time, he heard the hoarse myna. Crying: "Dasha! Don't be stingy this time!" Joke 3: Good News Son: Dad, let me tell you some good news. Dad: What’s the good news? Son: Didn’t you promise me that if I pass this exam, you would reward me with 100 yuan? Dad: Well, that’s what happened. Son: I’ll save this 100 yuan for you! Joke 4: What are your legs for? "Dad, I want to use your car tonight, can you?" "Then what are your legs for?" The father looked confused. "One leg is on the accelerator and the other on the brake." The son replied quickly. Joke 5: Catch a plane One day, a man hurriedly stopped a taxi and got in. Driver: "Excuse me, where do you want to go?" Man: "I have to go to the airport, I'm in a hurry, please hurry up." Driver: "Do you want to catch the flight? What time is it?" Man: "It's ten twenty." Driver: He smiled and said, "Don't be joking. It's already thirty and the plane won't be waiting for you." Man: "I'm sorry, I'm the pilot of this plane."