How is it that the two-month-old baby can't laugh because of him?

I said the child teased him, but he couldn't laugh. He just laughed alone. What happened? This is normal. He's only been two months. What does he know? Does he know you're joking? She said she couldn't understand what you said. Can he laugh? His energy efficiency belongs to a prodigy. What did he prove by laughing at himself? Prove that his trachea is fine. Does he know what happiness is and what unhappiness is? If he is two years old, he still doesn't understand you talking to him. You can think about it. What's wrong with him? If it's been two months, I think you tease her and she doesn't laugh. She's too normal, and he'll think, Wow, what's wrong with you? There is something wrong with his heart, you know?