What should I do in the face of such a silly son?

Why is your son like this now? Actually, you already know. I think you can trap your son. When you are happy, jokingly ask him if he has a girl he likes. If so, ask him to take it home and drop in. See what he says. If he is willing to tell you honestly, he is a net friend and has never met. Then you have to enlighten him. Tell him that a girl who has never met will accept such an expensive gift from you, so be careful. If you really want to date, let's meet first. Let's see if your son accepts it. I really hope your son won't be cheated, or he will be hit hard in his heart. I wish you happiness.