What jokes can only be understood by people with certain psychological knowledge?

1. A: I used to be psychologically miserable.

Oh, why?

I like wetting the bed.

B: ... that's unfortunate. Are you all right now?

A: I'm all right now.

Oh, I'm glad. How are you?

A: I talked to a counselor.

Really? He cured bed wetting?

No, he told me that bed wetting is acceptable.

2. The old pigeon said to the little pigeon, "You see that old man is very nice, but you should first establish an operational reflex for him. As long as I want to eat, I will peck at the pole-it took me a long time to teach him this. "