Is a 39-year-old man old?

Well, it depends on your mentality. I am 38 years old this year. I am not afraid of your jokes. Sometimes I have the thoughts (ideas) of a 28-year-old. Of course, when I am in a crowd, I always remind myself that I am already 38. I am almost 40 years old. Note, don’t act like a young man, but in my heart I really want to chat with those born in the 1990s. I also really want to talk and laugh with those born in the 1990s in the workplace, whether they are boys or girls. But I know that people already regard me as a middle-aged man and will not pay attention to me, so I pretend to be serious. Those younger brothers and sisters (those born in the 1990s) also respect me very much. So I say, whether a person ages or not depends on his mentality. Haha, I feel embarrassed after saying so much. After all, I am almost forty years old